diff --git a/classes/report.php b/classes/report.php
index 5b0a868..c5fffde 100644
--- a/classes/report.php
+++ b/classes/report.php
@@ -33,6 +33,7 @@ function __construct($uniqueid) {
         $this->define_columns($columns);
         $this->no_sorting('usermessage');
         $this->no_sorting('airesponse');
+        $this->sortable(true, 'timecreated', SORT_DESC);
 
         // Define the titles of columns to show in header.
         $headers = array('User ID', 'User Name', 'User Message', 'AI Response', 'Context', 'Time');
diff --git a/report.php b/report.php
index ece10c3..ee82a20 100644
--- a/report.php
+++ b/report.php
@@ -33,7 +33,6 @@
 $user = optional_param('user', '', PARAM_TEXT);
 $starttime = optional_param('starttime', '', PARAM_TEXT);
 $endtime = optional_param('endtime', '', PARAM_TEXT);
-$tsort = optional_param('tsort', '', PARAM_TEXT);
 
 $pageurl = $CFG->wwwroot . "/blocks/openai_chat/report.php?courseid=$courseid" .
     "&user=$user" .
@@ -95,9 +94,6 @@
     $where .= " AND ocl.timecreated < $endtime_ts";
 }
 
-if (!$tsort) {
-    $where .= " ORDER BY ocl.timecreated DESC";
-}
 
 $table->set_sql(
     "ocl.*, CONCAT(u.firstname, ' ', u.lastname) as user_name",