edit

service/agent/database/order.php

@@ -98,7 +98,13 @@ $order_type = array
 $button = array();
 $parent_mid = Dever::input('search_option_parent_mid');
 $mid = Dever::input('search_option_mid');
-$pmid = $parent_mid || $mid;
+if ($parent_mid) {
+    $pmid = $parent_mid;
+}
+if ($mid) {
+   $pmid = $mid; 
+}
+
 if ($pmid) {
     $button = array
     (