Just brought back a "new" MacBook from my local retail store. As I went to open it, I noticed the large clear seal seemed oddly thick. Upon closer inspection, I could see that it had a previous seal that had been cut open, and another seal over top. So, it appears I got someone's return sold to me as new. Is this common? Will be going back tomorrow to see if I can get an unopened computer. Not sure what the problem I purchased which someone else returned. Any other suggestions?