Purchased a brand new sealed in a box iPad Air on Black Friday at Staples. When I got home and opened the box, I noticed that when I pealed off the clear seal there was what appears to be the left over of a round greenish/blue sticker at the bottom near the right side of the speaker. Has anyone encountered this before? Is this a potential factory refurb? Should I return this iPad? Any advice, suggestions would be appreciated. Cheers!