My clock kind of does the same thing. But only not. I just changed the battery in my tib (I had this problem before the replacement too) but when I start the car the hour will almost always be wrong however, the minutes will always be right. And when i change it to the right hour, sometimes it will act possessed and the hours will start running up like I'm still holding the hour button in. On occasion, the hours will start changing no matter if I touched the button or not. Any idea folks? I've never unplugged the clock so y'all know.