diff --git a/angular-flexslider.coffee b/angular-flexslider.coffee
index d668c01..5dba236 100644
--- a/angular-flexslider.coffee
+++ b/angular-flexslider.coffee
@@ -65,7 +65,7 @@ angular.module('angular-flexslider', [])
 						toAdd = ({ value: c, index: i } for c, i in collection when not slidesItems[getTrackFromItem(c, i)]?)
 						toRemove = (i.collectionItem for t, i of slidesItems when not trackCollection[t]?)
 						# Workaround to a still unresolved problem in using flexslider.addSlide
-						if (toAdd.length == 1 and toRemove.length == 0) or toAdd.length == 0
+						if (toAdd.length >= 1 and toRemove.length == 0) or toAdd.length == 0
 							# Remove items
 							for e in toRemove
 								e = removeSlide e, collection.indexOf(e)
@@ -74,7 +74,7 @@ angular.module('angular-flexslider', [])
 							for e in toAdd
 								idx = e.index
 								addSlide e.value, idx, (item) ->
-									idx = undefined if idx == currentSlidesLength
+									idx = undefined if idx >= currentSlidesLength
 									$scope.$evalAsync ->
 										slider.addSlide(item.element, idx)
 							# Early exit
diff --git a/angular-flexslider.js b/angular-flexslider.js
index f5932f7..0ef5899 100644
--- a/angular-flexslider.js
+++ b/angular-flexslider.js
@@ -97,7 +97,7 @@
                   }
                   return _results;
                 })();
-                if ((toAdd.length === 1 && toRemove.length === 0) || toAdd.length === 0) {
+                if ((toAdd.length >= 1 && toRemove.length === 0) || toAdd.length === 0) {
                   for (_j = 0, _len1 = toRemove.length; _j < _len1; _j++) {
                     e = toRemove[_j];
                     e = removeSlide(e, collection.indexOf(e));
@@ -109,7 +109,7 @@
                     e = toAdd[_k];
                     idx = e.index;
                     addSlide(e.value, idx, function(item) {
-                      if (idx === currentSlidesLength) {
+                      if (idx >= currentSlidesLength) {
                         idx = void 0;
                       }
                       return $scope.$evalAsync(function() {
diff --git a/bower.json b/bower.json
index e75007d..f10441b 100644
--- a/bower.json
+++ b/bower.json
@@ -13,4 +13,4 @@
 		"type": "git",
 		"url": "git://github.com/thenikso/angular-flexslider.git"
 	}
-}
+}
\ No newline at end of file