diff --git a/admin/include/functions.php b/admin/include/functions.php
index 98946772e..fdee0bd89 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -2454,7 +2454,14 @@ SELECT name
   return $groupname;
 }
 
-function delete_groups($group_ids) {
+function delete_groups($group_ids) 
+{
+
+  if (count($group_ids) == 0)
+  {
+    trigger_error('There is no group to delete', E_USER_WARNING);
+    return false;
+  }
 
   $group_id_string = implode(',', $group_ids);
 
@@ -2462,7 +2469,7 @@ function delete_groups($group_ids) {
   $query = '
 DELETE
   FROM '. GROUP_ACCESS_TABLE .'
-  WHERE group_id IN('. $group_id_string  .')
+  WHERE group_id IN ('. $group_id_string  .')
 ;';
   pwg_query($query);
 
@@ -2470,14 +2477,14 @@ DELETE
   $query = '
 DELETE
   FROM '. USER_GROUP_TABLE .'
-  WHERE group_id IN('. $group_id_string  .')
+  WHERE group_id IN ('. $group_id_string  .')
 ;';
   pwg_query($query);
 
   $query = '
 SELECT id, name
   FROM `'. GROUPS_TABLE .'`
-  WHERE id IN('. $group_id_string  .')
+  WHERE id IN ('. $group_id_string  .')
 ;';
 
   $group_list = query2array($query, 'id', 'name');
@@ -2487,7 +2494,7 @@ SELECT id, name
   $query = '
 DELETE
   FROM `'. GROUPS_TABLE .'`
-  WHERE id IN('. $group_id_string  .')
+  WHERE id IN ('. $group_id_string  .')
 ;';
   pwg_query($query);
 
diff --git a/admin/themes/clear/theme.css b/admin/themes/clear/theme.css
index 32451510d..d95dcc3eb 100644
--- a/admin/themes/clear/theme.css
+++ b/admin/themes/clear/theme.css
@@ -494,7 +494,7 @@ input:focus + .slider {
   border-left:1px solid #e6e6e6;
 }
 
-.OrangeBackground{
+.GroupBackgroudSelected{
   background-color:#ffd7ad!important;
 }
 
diff --git a/admin/themes/default/js/group_list.js b/admin/themes/default/js/group_list.js
index f7f61d746..c1ed58a40 100644
--- a/admin/themes/default/js/group_list.js
+++ b/admin/themes/default/js/group_list.js
@@ -236,7 +236,7 @@ var toogleSelection = function(group_id, toggle) {
   groupBox = $("#group-"+group_id);
   if (toggle) {
     groupBox.find(".Group-checkbox input").attr("checked", true);
-    groupBox.addClass("OrangeBackground");
+    groupBox.addClass("GroupBackgroudSelected");
     groupBox.find(".icon-users-1").addClass("OrangeIcon");
     groupBox.find(".group_number_users").addClass("OrangeFont");
 
@@ -260,7 +260,7 @@ var toogleSelection = function(group_id, toggle) {
     option.appendTo("#MergeOptionsChoices");
   } else {
     groupBox.find(".Group-checkbox input").attr("checked", false);
-    groupBox.removeClass("OrangeBackground");
+    groupBox.removeClass("GroupBackgroudSelected");
     groupBox.find(".icon-users-1").removeClass("OrangeIcon");
     groupBox.find(".group_number_users").removeClass("OrangeFont");
     $(".DeleteGroupList div").each(function () {
@@ -537,6 +537,8 @@ $('.ConfirmMergeButton').on("click", function() {
           }))
         })
         toogleSelection(dest_grp, false)
+        $(".DeleteGroupList").html("");
+        $("#MergeOptionsChoices").html("");
 
         $("#group-"+dest_grp + " .group_number_users").html("<i class='icon-spin6 animate-spin'> </i>");
         jQuery.ajax({
@@ -593,6 +595,7 @@ $('.ConfirmDeleteButton').on("click", function() {
       backgroundDismiss: true,
     });
   })
+});
 
 /*-------
  Manage User Part
diff --git a/admin/themes/roma/theme.css b/admin/themes/roma/theme.css
index 3403babf5..efb8a2111 100644
--- a/admin/themes/roma/theme.css
+++ b/admin/themes/roma/theme.css
@@ -508,7 +508,7 @@ input:focus + .slider {
   border-left:1px solid #1a1a1a;
 }
 
-.OrangeBackground{
+.GroupBackgroudSelected{
   background-color:#f9852c!important;
 }
 
diff --git a/include/ws_functions/pwg.groups.php b/include/ws_functions/pwg.groups.php
index 765645862..5d6c7fabb 100644
--- a/include/ws_functions/pwg.groups.php
+++ b/include/ws_functions/pwg.groups.php
@@ -214,8 +214,7 @@ SELECT COUNT(*)
   mass_inserts(
     USER_GROUP_TABLE,
     array('group_id', 'user_id'),
-    $inserts,
-    array('ignore'=>true)
+    $inserts
     );
 
   include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
@@ -246,6 +245,7 @@ function ws_groups_merge($params, &$service) {
 
   $all_groups = array_unique($all_groups);
   $merge_group = array_diff($params['merge_group_id'], array($params['destination_group_id']));
+  $merge_group_object = $service->invoke('pwg.groups.getList', array('group_id' => $params['merge_group_id']));
 
   $query = '
 SELECT COUNT(*)
@@ -266,7 +266,7 @@ SELECT COUNT(*)
 SELECT DISTINCT(user_id) 
   FROM `'. USER_GROUP_TABLE .'` 
   WHERE 
-    group_id in ('.implode(',', $merge_group) .')
+    group_id IN ('.implode(',', $merge_group) .')
 ;';
   $user_in_merge_groups = query2array($query, null, 'user_id');
 
@@ -303,14 +303,17 @@ SELECT user_id
   pwg_activity('group', $params['destination_group_id'], 'edit');
   foreach ($user_to_add as $user_id) 
   {
-    pwg_activity('user', $user_id, 'edit');
+    pwg_activity('user', $user_id, 'edit', array("associated" => $params['destination_group_id']));
   }
 
   include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
 
   delete_groups($merge_group);
 
-  return $service->invoke('pwg.groups.getList', array('group_id' => $params['destination_group_id']));
+  return array(
+    "destination_group" => $service->invoke('pwg.groups.getList', array('group_id' => $params['destination_group_id'])),
+    "deleted_group" => $merge_group_object
+  );
 }
 
 /**