It seems like my N7 may have some issues, but I don't know if these are normal or not. The first issue I've had is the touch screen. It sucks! It seems now like I have to touch things 2 or 3 times before it registers. Scrolling isn't smooth either. The next issue is also with the screen. I saw this first yesterday but sometimes it flickers like an old TV. I'm wondering if these problems are normal and if I should return? Thank you