VideoStudio :: Rendered Video Repeats Frames?

I'm using Ulead VS 11. When I make a clip and render it as new video, the new video is repeating frames all over the place. As it renders I can see it happening. It's like the video renders minute/second 1:01, then jumps back to 1:00, then re-renders 1:01. All over the place. These repeat frames are not in the original video.

The format of the original video is MPEG2, 8000 bps, and is being converted to WMV (don't ask!). I have found that the only way to retain any semblance of quality in the new video is to change it to WMV, and for my purposes, this is adequate. I have tried about 10 of the different output formats offered in the "Create Video" option, including saving with settings the same as project settings, and the result is the same, with the exception that the WMV 720 is the only one where a decent quality is maintained. That's a whole other question -- why rendering with "same as project settings" gives me total junk.

Is there some other setting that could be causing these frame repeats? I don't believe I had these problems when the original video was WMV rendering to WMV. But MPEG2 to MPEG2 is not fixing it either, so there must be something else.