You can check your order in the back order by logging in to member service system and click Check My Order as the picture below :
You can specify your checking condition.
shows item status such as 1-NEW, 2-COMPLETED
Group No. Group No. will be available unless you specify to ship all items as one and some item is out of stock, system will put the same set of number for all items for your understanding. If you have more than one item and you specify your shipping method as Partial Shipment Allowed, only out of stock item will be put in the back order and the Group No. will be 0 (zero). Other items will be issued an invoice accordingly.
Order that is in providing process.
Order that has been issued an invoice and ready to ship or shipped.
6-Ready To Ship
Order that is ready to ship and we are issuing your invoice.