[Absent Minded Abe]

I was just wondering if this was normal; sometimes my tablet (Intuos2 4x5) doesn't recognize the mouse/pen for an unknown reason when I am moving the cursor around, and requires me to lift up the pointing device from the tablet, to a distance where it can not sense the device, in order for it to sense the device once put back in the field of recognition. I think it only does that when I lift it to a point that it can not recognize it, and just doesn't sense it when it goes back in, but I was wondering if that was sometimes normal...
Also, a lot of the time when I go down to the taskbar to click something, the cursor moves to a different position, and ends up clicking something else, or just moves to another location.

Oh yeah, the scrollwheel (when used in games only) often moves the cursor to one of the corners of the screen, or to some far off place in some games, making the screen change position and rendering the scrollwheel useless. (I know I probably shouldn't be using it for games, but... >_>) The scrollwheel works fine out of video game programs though.
Okay so it's actually three. :\

I'm using Windows XP Pro.