Hello, hope I do this right. I have the le pan, I am having trouble with the touch screen. It doesn't seem to do what I need, but what it wants. On facebook, trying to scroll down, it sometimes gets bigger and smaller. Doesn't register that I touch something to select it etc, trying to play games and it will release before I do it etc... Is this possibly a faulty unit or is there a way to calibrate the screen? thanks