I just got my HTC Thunderbolt 4G on Monday. I'm having trouble scrolling the contacts. It just downright doesn't want to work. I'll be scrolling though, and it will randomly jump around. Example: If I try to get to a specific name in A, it will decide that I want to go to S. I am only touching the screen with one finger. I've tried several ways of try to navigate this problem, but I can't find any solution. Any tips?