I have a similar issue. Ordered MB 7 and 7+ and I only see 7. Gives me the same message and I only see 7. But the app shows me both the orders, weird! Anyways, I got confirmation texts for both the orders separately and my dates are the same for both of them.
Looking at the movements of orders in this thread, it appears to me that my MB 7 should have moved yesterday but 7+ probably held it back. I read somewhere that T-Mobile ships your orders on a transaction basis. So if you have two orders on one transaction and one of them is taking longer, the order one will be held as well. Not sure if that's true but would make sense in my case.