diff --git a/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/static/app/controllers/gridcontroller.js b/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/static/app/controllers/gridcontroller.js
index 7f2833ef4ac53770a75e6080b52f1fd1ce20f961..461b7892185fb56d3dedcbf26ee927539a7a1cb5 100644
--- a/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/static/app/controllers/gridcontroller.js
+++ b/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/static/app/controllers/gridcontroller.js
@@ -78,7 +78,7 @@ $scope.columns = [
     { field: 'mom_object_group_id',
         displayName: 'Group',
         enableCellEdit: false,
-        cellTemplate:'<a target="_blank" href="https://lofar.astron.nl/mom3/user/project/setUpMom2ObjectDetails.do?view=generalinfo&mom2ObjectId={{row.entity.mom_object_group_mom2object_id}}">{{row.entity.mom_object_group_name}} {{row.entity.mom_object_group_id}}</a>',
+        cellTemplate:'<a target="_blank" href="https://lofar.astron.nl/mom3/user/project/setUpMom2ObjectDetails.do?view=generalinfo&mom2ObjectId={{row.entity.mom_object_group_mom2object_id}}">{{row.entity.mom_object_group_id}} {{row.entity.mom_object_group_name}}</a>',
         width: '13%',
         filter: {
             condition: uiGridConstants.filter.EXACT,
@@ -255,6 +255,11 @@ $scope.columns = [
         $scope.$evalAsync(jumpToSelectedTaskRows);
     }, true);
 
+    $scope.$watch('dataService.filteredTaskChangeCntr', function() {
+        $scope.$evalAsync(fillProjectsColumFilterSelectOptions)
+        $scope.$evalAsync(fillGroupsColumFilterSelectOptions);
+    });
+
     $scope.$watch('dataService.initialLoadComplete', function() {
         $scope.$evalAsync(function() {
             taskstatustypenames = $scope.dataService.taskstatustypes.map(function(x) { return x.name; });
@@ -271,10 +276,10 @@ $scope.columns = [
     function fillProjectsColumFilterSelectOptions() {
         var projectNames = [];
         var momProjectsDict = $scope.dataService.momProjectsDict;
-        var tasks = $scope.dataService.tasks;
+        var tasks = $scope.dataService.filteredTasks;
         //get unique projectIds from tasks
         var task_project_ids = tasks.map(function(t) { return t.project_mom_id; });
-        task_project_ids = task_project_ids.filter(function(value, index, arr) { return arr.indexOf(value) == index;})
+        task_project_ids = task_project_ids.filter(function(value, index) { return task_project_ids.indexOf(value) == index;})
 
         for(var project_id of task_project_ids) {
             if(momProjectsDict.hasOwnProperty(project_id)) {
@@ -289,13 +294,22 @@ $scope.columns = [
     };
 
     function fillGroupsColumFilterSelectOptions() {
-        var tasks = $scope.dataService.tasks;
+        var tasks = $scope.dataService.filteredTasks;
         //get unique groupNames from tasks
-        var groupNamesAndIds = tasks.map(function(t) { return { name: t.mom_object_group_name, id: t.mom_object_group_id }; });
-        groupNamesAndIds = groupNamesAndIds.filter(function(value, index, arr) { return arr.indexOf(value) == index;})
-        groupNamesAndIds.sort();
+        var groupId2Name = {};
+        var groupIds = [];
+
+        for(var task of tasks) {
+            if(task.mom_object_group_id) {
+                if(!groupId2Name.hasOwnProperty(task.mom_object_group_id)) {
+                    groupId2Name[task.mom_object_group_id] = task.mom_object_group_name;
+                    groupIds.push(task.mom_object_group_id);
+                }
+            }
+        }
 
-        var groupSelectOptions = groupNamesAndIds.map(function(obj) { return { value: obj.id, label: obj.name + ' ' + obj.id }; });
+        var groupSelectOptions = groupIds.map(function(gid) { return { value: gid, label: gid + ' ' + groupId2Name[gid]}; });
+        groupSelectOptions.sort(function(a,b) { return a.value - b.value; });
 
         fillColumFilterSelectOptions(groupSelectOptions, $scope.columns[7]);
     };