Anyways I converted some mkv files to avi, and started putting them on Vegas. When I play the files by themselves (outside of vegas) it looks just fine. And for about 90% it looks fine on Vegas. However at key points where the scenes changes drastically, I get moments like this

This is the first frame in a new scene, and the image thats bleeding through it is from the previous frame. This is happening alot and I was originally going to just cut these out but they're started to pop up at key moments I want to include in my video. Any suggestions?
(I tried messing around with the properties of the clips, trying the disable resample, and such)