in the results page, the form tag is outside the repeat region.
Move the form tag from line 400:
<form name="eCart1_1_ATC_<?php echo $row_WADAitems["ItemID"]; ?>" method="POST" action="<?php echo $_SERVER["PHP_SELF"]; ?><?php echo (isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] != "")?"?".$_SERVER["QUERY_STRING"]:""; ?>" class="DetailsPage Cool_Default" id="Results_Cool_Default" >
so that it is just before the eCart1_1_ID_Add hidden element:
<input type="hidden" name="eCart1_1_ID_Add" value="<?php echo $row_WADAitems["ItemID"]; ?>" >
also move the closing form tag so that it is just after the add to
cart submit button.