So I got an iPad Air 2 16gb. Just like many of you I got that screen problem (black line on left). I went to Apple Store to replace it. The genius bar laughed and said yeah all the previous people had the same problem. He replaced it. I found out that I really needed a 64gb instead. So I went to the store again and try to return it and buy the 64. Here's where the problem is. They said NO WAY. They said once it's been replaced it can't be returned. Huh? I said its not really my fault that mine came defective. They still said they can't do it. Anyone experienced this?