Did your capture device come with its own capture software? It is advised to use the devices software to do the capturing, then to use VS for the editing.
as all i want to do is copy videos i then click capture video. this causes the view on the monitor to start hiccuping and the sound to start jumping.
This statement, and the fact that your out of sync problem gets progressively worse, could point to dropped frames. If you are using VS to capture turn on the drop frame counter (in Preferences) and recapture.