The backordered status reflects the stock situation for the particular item at the time of the order. If an order shows “Completed”, that means that it has shipped. I know that’s confusing, but the inventory system doesn’t do a proper job of updating when inventory is added. I think that the system isn’t smart enough to know which orders to apply stock to when it’s received.
My order shows completed but status is backordered.
Geren Answered question