Order by primary key as second criterion

application/models/Logbook_model.php

@@ -1113,6 +1113,7 @@ class Logbook_model extends CI_Model {
     $this->db->join('station_profile', 'station_profile.station_id = '.$this->config->item('table_name').'.station_id');
     $this->db->where_in('station_profile.station_id', $logbooks_locations_array);
     $this->db->order_by(''.$this->config->item('table_name').'.COL_TIME_ON', "desc");
+    $this->db->order_by(''.$this->config->item('table_name').'.COL_PRIMARY_KEY', "desc");
 
     $this->db->limit($num);
     $this->db->offset($offset);
@@ -1179,7 +1180,7 @@ class Logbook_model extends CI_Model {
       
       $sql = "SELECT * FROM ( select * from " . $this->config->item('table_name'). "
         WHERE station_id IN(". $location_list .")
-        order by col_time_on desc
+        order by col_time_on desc, col_primary_key desc
         limit " . $num .
         ") hrd
         JOIN station_profile ON station_profile.station_id = hrd.station_id

application/models/Logbookadvanced_model.php

@@ -91,7 +91,7 @@ class Logbookadvanced_model extends CI_Model {
 			INNER JOIN station_profile ON qsos.station_id=station_profile.station_id
 			WHERE station_profile.user_id =  ?
 			$where
-			ORDER BY qsos.COL_TIME_ON desc
+			ORDER BY qsos.COL_TIME_ON desc, qsos.COL_PRIMARY_KEY desc
 			LIMIT $limit
 		";