I have done this in vegas

I have done this in vegas 8 or close to it. The only thing I can think of is are you eyeballing the postitions so by the eye they look lined up, or when you have your track motion window open do all four tracks have equal height and width. I am trying to think what it could be. I know that when I render stuff like this on my vegas it previews as I edited it. I guess try looking at that and see I will look at mine and see how it comes out.