|Download and install vDub from http://www.dvdvideosoft.com/product...|
Use this to sync the video and audio streams. It can take a little while to get it right, but it's a free solution to an annoying problem.
I'd also try using a different burning program. Vuze is both converting and burning the videos, and is probably not doing it well.
Please let us know if you found someone's advice to be helpful.