I was on the Apple site trying to order 2 iPhone 5s. After I added the 2nd phone, this message was at the top of the screen in red.... 'Only one carrier-activated iPhone can be ordered at a time. Please make sure only one carrier-activated iPhone is in your Cart. Your Cart may contain multiple unlocked iPhones.' What does that mean? I put in each number separately. I have 2 lines with AT&T and I am getting 2 new iPhones Do I have to place 2 separate orders??