AT&T Locator Issue

HIS
ORDER BY
(SELECT count(sl_id) FROM wp_slp_tagalong WHERE wp_store_locator.sl_id=wp_slp_tagalong.sl_id) DESC ,
,
sl_distance ASC


DEV
ORDER BY
(SELECT count(sl_id) FROM wp_slp_tagalong WHERE wp_store_locator.sl_id=wp_slp_tagalong.sl_id) DESC ,
sl_distance ASC,
sl_distance ASC


class.data.php
                // ORDER BY
                //
                case 'orderby_default':
                    // FILTER: slp_ajaxsql_orderby
                    $order = apply_filters('slp_ajaxsql_orderby','');
                    if (!empty($order)) {
                        $sqlStatement .= ' ORDER BY ' . $order . ' ';
                    }
                    break;


class.ajaxhandler.php
    add_filter('slp_ajaxsql_orderby',array($this,'filter_SetDefaultOrderByDistance'),100);
    function filter_SetDefaultOrderByDistance($orderby) {
        return $this->slplus->database->extend_OrderBy($orderby,' sl_distance ASC ');
    }


class.data.php
    function extend_OrderBy($startwith,$add) {
        return $startwith.(empty($startwith)?'':',').$add;
    }