找到includes/lib_order.php

找到：

    $sql = "SELECT SUM(goods_price * goods_number) " .
            " FROM " . $GLOBALS['ecs']->table('cart') .
            " WHERE session_id = '" . SESS_ID . "' " .
            "AND rec_type = '$type' ";

替换为：

    $sql = "SELECT SUM(goods_price * goods_number) " .
            " FROM " . $GLOBALS['ecs']->table('cart') .
            " WHERE session_id = '" . SESS_ID . "' " .
            " AND rec_id " .db_create_in($_SESSION['cart_rec_ids'])." ".
            "AND rec_type = '$type' ";