The only reason I am concerned is because I got an email last night stating I need to come to the apple store to complete my purchase, even though I ordered via online store for home delivery. I did call Apple and they said I'd have it tomorrow shipped though
I had one of those emails before to. It was a mistake with their system. When I was ordering I went through the process first to see how much I was going to have to pay, and then did not even complete the order. In fact, I did not even say if I was going to pick it up at a store. But they sent me one of those emails as well. If you have a order number, just follow what the order number page says. Forget the emails.