diff --git a/src/categories/delete.js b/src/categories/delete.js
index 5c8e5bdf9a..f91842e487 100644
--- a/src/categories/delete.js
+++ b/src/categories/delete.js
@@ -11,19 +11,30 @@ var privileges = require('../privileges');
 module.exports = function (Categories) {
 
 	Categories.purge = function (cid, uid, callback) {
-		batch.processSortedSet('cid:' + cid + ':tids', function (tids, next) {
-			async.eachLimit(tids, 10, function (tid, next) {
-				topics.purgePostsAndTopic(tid, uid, next);
-			}, next);
-		}, {alwaysStartAt: 0}, function (err) {
-			if (err) {
-				return callback(err);
+		async.waterfall([
+			function (next) {
+				batch.processSortedSet('cid:' + cid + ':tids', function (tids, next) {
+					async.eachLimit(tids, 10, function (tid, next) {
+						topics.purgePostsAndTopic(tid, uid, next);
+					}, next);
+				}, {alwaysStartAt: 0}, next);
+			},
+			function (next) {
+				Categories.getPinnedTids('cid:' + cid + ':tids:pinned', 0, -1, next);
+			},
+			function (pinnedTids, next) {
+				async.eachLimit(pinnedTids, 10, function (tid, next) {
+					topics.purgePostsAndTopic(tid, uid, next);
+				}, next);
+			},
+			function (next) {
+				purgeCategory(cid, next);
+			},
+			function (next) {
+				plugins.fireHook('action:category.delete', cid);
+				next();
 			}
-			async.series([
-				async.apply(purgeCategory, cid),
-				async.apply(plugins.fireHook, 'action:category.delete', cid)
-			], callback);
-		});
+		], callback);
 	};
 
 	function purgeCategory(cid, callback) {
@@ -37,6 +48,7 @@ module.exports = function (Categories) {
 			function (next) {
 				db.deleteAll([
 					'cid:' + cid + ':tids',
+					'cid:' + cid + ':tids:pinned',
 					'cid:' + cid + ':tids:posts',
 					'cid:' + cid + ':pids',
 					'cid:' + cid + ':read_by_uid',
@@ -50,7 +62,9 @@ module.exports = function (Categories) {
 					groups.destroy('cid:' + cid + ':privileges:' + privilege, next);
 				}, next);
 			}
-		], callback);
+		], function (err) {
+			callback(err);
+		});
 	}
 
 	function removeFromParent(cid, callback) {
diff --git a/src/categories/topics.js b/src/categories/topics.js
index ec211da960..c60050c667 100644
--- a/src/categories/topics.js
+++ b/src/categories/topics.js
@@ -14,7 +14,7 @@ module.exports = function (Categories) {
 				plugins.fireHook('filter:category.topics.prepare', data, next);
 			},
 			function (data, next) {
-				Categories.getTopicIds(data.set, data.reverse, data.start, data.stop, next);
+				Categories.getTopicIds(data.cid, data.set, data.reverse, data.start, data.stop, next);
 			},
 			function (tids, next) {
 				topics.getTopicsByTids(tids, data.uid, next);
@@ -36,6 +36,58 @@ module.exports = function (Categories) {
 		], callback);
 	};
 
+	Categories.getTopicIds = function (cid, set, reverse, start, stop, callback) {
+	 	var pinnedTids;
+		var pinnedCount;
+		var totalPinnedCount;
+
+		async.waterfall([
+			function (next) {
+				Categories.getPinnedTids(cid, 0, -1, next);
+			},
+			function (_pinnedTids, next) {
+				totalPinnedCount = _pinnedTids.length;
+
+				pinnedTids = _pinnedTids.slice(start, stop === -1 ? undefined : stop + 1);
+
+				pinnedCount = pinnedTids.length;
+
+				var topicsPerPage = stop - start + 1;
+
+				var normalTidsToGet = Math.max(0, topicsPerPage - pinnedCount);
+
+				if (!normalTidsToGet && stop !== -1) {
+					return next(null, []);
+				}
+				if (start > 0 && totalPinnedCount) {
+					start -= totalPinnedCount - pinnedCount;
+				}
+				stop = stop === -1 ? stop : start + normalTidsToGet - 1;
+
+				if (Array.isArray(set)) {
+					db[reverse ? 'getSortedSetRevIntersect' : 'getSortedSetIntersect']({sets: set, start: start, stop: stop}, next);
+				} else {
+					db[reverse ? 'getSortedSetRevRange' : 'getSortedSetRange'](set, start, stop, next);
+				}
+			},
+			function (normalTids, next) {
+				normalTids = normalTids.filter(function (tid) {
+					return pinnedTids.indexOf(tid) === -1;
+				});
+
+				next(null, pinnedTids.concat(normalTids));
+			}
+		], callback);
+	};
+
+	Categories.getAllTopicIds = function (cid, start, stop, callback) {
+		db.getSortedSetRange(['cid:' + cid + ':tids:pinned', 'cid:' + cid + ':tids'], start, stop, callback);
+	};
+
+	Categories.getPinnedTids = function (cid, start, stop, callback) {
+		db.getSortedSetRevRange('cid:' + cid + ':tids:pinned', start, stop, callback);
+	};
+
 	Categories.modifyTopicsByPrivilege = function (topics, privileges) {
 		if (!Array.isArray(topics) || !topics.length || privileges.isAdminOrMod) {
 			return;
@@ -52,22 +104,9 @@ module.exports = function (Categories) {
 		});
 	};
 
-	Categories.getTopicIds = function (set, reverse, start, stop, callback) {
-		if (Array.isArray(set)) {
-			db[reverse ? 'getSortedSetRevIntersect' : 'getSortedSetIntersect']({sets: set, start: start, stop: stop}, callback);
-		} else {
-			db[reverse ? 'getSortedSetRevRange' : 'getSortedSetRange'](set, start, stop, callback);
-		}
-	};
-
 	Categories.getTopicIndex = function (tid, callback) {
-		topics.getTopicField(tid, 'cid', function (err, cid) {
-			if (err) {
-				return callback(err);
-			}
-
-			db.sortedSetRevRank('cid:' + cid + ':tids', tid, callback);
-		});
+		console.warn('[Categories.getTopicIndex] deprecated');
+		callback(null, 1);
 	};
 
 	Categories.onNewPostMade = function (cid, pinned, postData, callback) {
diff --git a/src/socket.io/topics/move.js b/src/socket.io/topics/move.js
index 699c5e5d35..25f5f8a19d 100644
--- a/src/socket.io/topics/move.js
+++ b/src/socket.io/topics/move.js
@@ -62,7 +62,7 @@ module.exports = function (SocketTopics) {
 					return callback(new Error('[[error:no-privileges]]'));
 				}
 
-				categories.getTopicIds('cid:' + data.currentCid + ':tids', true, 0, -1, next);
+				categories.getAllTopicIds(data.currentCid, 0, -1, next);
 			},
 			function (tids, next) {
 				async.eachLimit(tids, 50, function (tid, next) {
diff --git a/src/topics.js b/src/topics.js
index 900a46d604..ff5d40fc2d 100644
--- a/src/topics.js
+++ b/src/topics.js
@@ -53,23 +53,8 @@ var social = require('./social');
 	};
 
 	Topics.getTidPage = function (tid, uid, callback) {
-		if(!tid) {
-			return callback(new Error('[[error:invalid-tid]]'));
-		}
-
-		async.parallel({
-			index: function (next) {
-				categories.getTopicIndex(tid, next);
-			},
-			settings: function (next) {
-				user.getSettings(uid, next);
-			}
-		}, function (err, results) {
-			if (err) {
-				return callback(err);
-			}
-			callback(null, Math.ceil((results.index + 1) / results.settings.topicsPerPage));
-		});
+		console.warn('[Topics.getTidPage] deprecated!');
+		callback(null, 1);
 	};
 
 	Topics.getTopicsFromSet = function (set, uid, start, stop, callback) {
diff --git a/src/topics/delete.js b/src/topics/delete.js
index df63ebe3bc..91c1bf53e3 100644
--- a/src/topics/delete.js
+++ b/src/topics/delete.js
@@ -177,6 +177,7 @@ module.exports = function (Topics) {
 				function (next) {
 					db.sortedSetsRemove([
 						'cid:' + topicData.cid + ':tids',
+						'cid:' + topicData.cid + ':tids:pinned',
 						'cid:' + topicData.cid + ':tids:posts',
 						'cid:' + topicData.cid + ':uid:' + topicData.uid + ':tids',
 						'uid:' + topicData.uid + ':topics'
diff --git a/src/topics/recent.js b/src/topics/recent.js
index 421bb0cd71..23ca9ff5ba 100644
--- a/src/topics/recent.js
+++ b/src/topics/recent.js
@@ -7,6 +7,7 @@ var db = require('../database');
 var plugins = require('../plugins');
 var privileges = require('../privileges');
 var user = require('../user');
+var categories =  require('../categories');
 
 module.exports = function (Topics) {
 	var terms = {
@@ -24,7 +25,11 @@ module.exports = function (Topics) {
 
 		async.waterfall([
 			function (next) {
-				db.getSortedSetRevRange(cid ? 'cid:' + cid + ':tids' : 'topics:recent', 0, 199, next);
+				if (cid) {
+					categories.getTopicIds(cid, 'cid:' + cid + ':tids', true, 0, 199, next);
+				} else {
+					db.getSortedSetRevRange('topics:recent', 0, 199, next);
+				}
 			},
 			function (tids, next) {
 				filterTids(tids, uid, filter, next);
diff --git a/src/topics/suggested.js b/src/topics/suggested.js
index aebef72683..d51d51827b 100644
--- a/src/topics/suggested.js
+++ b/src/topics/suggested.js
@@ -72,7 +72,7 @@ module.exports = function (Topics) {
 				Topics.getTopicField(tid, 'cid', next);
 			},
 			function (cid, next) {
-				categories.getTopicIds('cid:' + cid + ':tids', true, 0, 9, next);
+				categories.getTopicIds(cid, 'cid:' + cid + ':tids', true, 0, 9, next);
 			}
 		], callback);
 	}
diff --git a/src/topics/tools.js b/src/topics/tools.js
index 6fce256f27..377b3bdfcd 100644
--- a/src/topics/tools.js
+++ b/src/topics/tools.js
@@ -4,7 +4,6 @@ var async = require('async');
 
 var db = require('../database');
 var categories = require('../categories');
-var meta = require('../meta');
 var plugins = require('../plugins');
 var privileges = require('../privileges');
 
@@ -167,7 +166,7 @@ module.exports = function (Topics) {
 				if (!exists) {
 					return callback(new Error('[[error:no-topic]]'));
 				}
-				Topics.getTopicFields(tid, ['cid', 'lastposttime'], next);
+				Topics.getTopicFields(tid, ['cid', 'lastposttime', 'postcount'], next);
 			},
 			function (_topicData, next) {
 				topicData = _topicData;
@@ -177,9 +176,24 @@ module.exports = function (Topics) {
 				if (!isAdminOrMod) {
 					return next(new Error('[[error:no-privileges]]'));
 				}
+
 				async.parallel([
 					async.apply(Topics.setTopicField, tid, 'pinned', pin ? 1 : 0),
-					async.apply(db.sortedSetAdd, 'cid:' + topicData.cid + ':tids', pin ? Math.pow(2, 53) : topicData.lastposttime, tid)
+					function (next) {
+						if (pin) {
+							async.parallel([
+								async.apply(db.sortedSetAdd, 'cid:' + topicData.cid + ':tids:pinned', Date.now(), tid),
+								async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':tids', tid),
+								async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':tids:posts', tid),
+							], next);
+						} else {
+							async.parallel([
+								async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':tids:pinned', tid),
+								async.apply(db.sortedSetAdd, 'cid:' + topicData.cid + ':tids', topicData.lastposttime, tid),
+								async.apply(db.sortedSetAdd, 'cid:' + topicData.cid + ':tids:posts', topicData.postcount, tid),
+							], next);
+						}
+					}
 				], next);
 			},
 			function (results, next) {
@@ -213,20 +227,24 @@ module.exports = function (Topics) {
 				topic = topicData;
 				db.sortedSetsRemove([
 					'cid:' + topicData.cid + ':tids',
+					'cid:' + topicData.cid + ':tids:pinned',
 					'cid:' + topicData.cid + ':tids:posts'
 				], tid, next);
 			},
 			function (next) {
-				var timestamp = parseInt(topic.pinned, 10) ? Math.pow(2, 53) : topic.lastposttime;
-				async.parallel([
-					function (next) {
-						db.sortedSetAdd('cid:' + cid + ':tids', timestamp, tid, next);
-					},
-					function (next) {
-						topic.postcount = topic.postcount || 0;
-						db.sortedSetAdd('cid:' + cid + ':tids:posts', topic.postcount, tid, next);
-					}
-				], next);
+				if (parseInt(topic.pinned, 10)) {
+					db.sortedSetAdd('cid:' + cid + ':tids:pinned', Date.now(), tid, next);
+				} else {
+					async.parallel([
+						function (next) {
+							db.sortedSetAdd('cid:' + cid + ':tids', topic.lastposttime, tid, next);
+						},
+						function (next) {
+							topic.postcount = topic.postcount || 0;
+							db.sortedSetAdd('cid:' + cid + ':tids:posts', topic.postcount, tid, next);
+						}
+					], next);
+				}
 			}
 		], function (err) {
 			if (err) {
diff --git a/src/upgrade.js b/src/upgrade.js
index 135d53b9fc..79ffa6b5ee 100644
--- a/src/upgrade.js
+++ b/src/upgrade.js
@@ -1,6 +1,6 @@
 "use strict";
 
-/* globals define, console, require */
+/* globals console, require */
 
 var db = require('./database'),
 	async = require('async'),
@@ -1016,7 +1016,49 @@ Upgrade.upgrade = function (callback) {
 				winston.info('[2016/11/22] Update global and user language keys - skipped!');
 				next();
 			}
-		}
+		},
+		function (next) {
+			thisSchemaDate = Date.UTC(2016, 10, 25);
+
+			if (schemaDate < thisSchemaDate) {
+				updatesMade = true;
+				winston.info('[2016/11/25] Creating sorted sets for pinned topcis');
+
+				var topics = require('./topics');
+				var batch = require('./batch');
+				batch.processSortedSet('topics:tid', function (ids, next) {
+					topics.getTopicsFields(ids, ['tid', 'cid', 'pinned', 'lastposttime'], function (err, data) {
+						if (err) {
+							return next(err);
+						}
+
+						data = data.filter(function (topicData) {
+							return parseInt(topicData.pinned, 10) === 1;
+						});
+
+						async.eachSeries(data, function (topicData, next) {
+							console.log('processing tid: ' + topicData.tid);
+
+							async.parallel([
+								async.apply(db.sortedSetAdd, 'cid:' + topicData.cid + ':tids:pinned', Date.now(), topicData.tid),
+								async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':tids', topicData.tid),
+								async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':tids:posts', topicData.tid)
+							], next);
+						}, next);
+					});
+				}, function (err) {
+					if (err) {
+						return next(err);
+					}
+
+					winston.info('[2016/11/25] Creating sorted sets for pinned topics - done');
+					Upgrade.update(thisSchemaDate, next);
+				});
+			} else {
+				winston.info('[2016/11/25] Creating sorted sets for pinned topics - skipped!');
+				next();
+			}
+		},
 		// Add new schema updates here
 		// IMPORTANT: REMEMBER TO UPDATE VALUE OF latestSchema IN LINE 24!!!
 	], function (err) {
diff --git a/test/categories.js b/test/categories.js
index a7e37f244e..abcaf118c8 100644
--- a/test/categories.js
+++ b/test/categories.js
@@ -366,6 +366,28 @@ describe('Categories', function () {
 				});
 			});
 		});
+
+		it('should purge category', function (done) {
+			Categories.create({
+				name: 'purge me',
+				description: 'update description'
+			}, function (err, category) {
+				assert.ifError(err);
+				Topics.post({
+					uid: posterUid,
+					cid: category.cid,
+					title: 'Test Topic Title',
+					content: 'The content of test topic'
+				}, function (err) {
+					assert.ifError(err);
+					socketCategories.purge({uid: adminUid}, category.cid, function (err) {
+						assert.ifError(err);
+						done();
+					});
+				});
+
+			});
+		});
 	});