Watch your bank account or credit card information. It will show the purchase before the website.
The 0 backordered is in reference to the warehouse. When they get a shipment, the backordered bit is 0. When they run out, it reverts to 1.
When yours ships, the FRT will toggle to 0 (and perhaps back) but once you see that it ships. However, that website is horribly buggy and slow. You'll see it quicker if you watch your debit card/credit card activity, and then the next business day, that web site usually has your tracking number.
That is what happened to me on both iPhones I ordered and have recieved.