diff --git a/grade/edit/tree/lib.php b/grade/edit/tree/lib.php
index 564a1cd177c..4e631e73f3f 100755
--- a/grade/edit/tree/lib.php
+++ b/grade/edit/tree/lib.php
@@ -399,6 +399,7 @@ class grade_edit_tree {
 
             $object->set_parent($parent->id);
             $object->move_after_sortorder($sortorder);
+            $sortorder++;
         }
 
         redirect($returnurl, '', 0);