Audio Dolby and MPG2 showing up different lengths

Hello everyone!
I have been compressing my FCP project with compressor into a MPG2 file and a Dolby Audio file for use in DVD studio pro. Only problem is that the audio tracks and the video tracks are slightly different sizes in the timeline, like only a frame or two. What is happening? is there any way to exactly align just the start points? Anyone have any experience with these issues?
Hoping for some pro-advice!
P.S. thanks for all the help in here over the past few years!

I just posted a similar but slightly different question here.
This is fairly standard behavior - you can see this in play by opening an AIFF file in Quicktime, looking at the length, then dropping it into DVDSP and see the length reported differently. I've read a few possible explanations but I don't know exactly why. Something to do with Dolby and the way it interprets frames?
As the other person said, if the audio and video are in sync that is the bottom line. Watch clips at different parts of the video (definitely paying attention at the end). If it's in sync, you're all set. What your eyes and ears see are what other people will too, and that's way more important than what DVDSP tells you..
My problem is that the stereo AIFF files and 5.1 AC-3 files are WAY different lengths and the video/5.1 loses sync. A different dilemma altogether.
Jason
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