classes/invite_tree.class.php

           if ($LastClass == 'Torrent Celebrity') {
              $LastClass = 'Torrent Celebrities';
           } else {
+            // Prevent duplicate letterss
+            if (substr($LastClass, -1) != 's') {
               $LastClass.='s';
             }
           }
+        }
         $LastClass = "$ClassCount $LastClass (" . number_format(($ClassCount / $Count) * 100) . '%)';
 
         $ClassStrings[] = $LastClass;