Distinct rows only when fetching sorted requests.

application/models/tables/Requests.php

@@ -42,6 +42,7 @@ class Requests extends Nmc_Db_Table {
         $cc = CourseCodes::getInstance()->getTableName();
 
         $select = $db->select();
+        $select->distinct();
         $select->from($rq, '*');
         $select->join($cg, $rq . '.' . $this->getPrimaryKeyName() . ' = ' . $cg . '.request');
         $select->join($cx, $cg . '.' . CourseGenerations::getInstance()->getPrimaryKeyName() . ' = ' . $cx . '.generation');