How Do I Prevent Audio Skew On A Dvd Burn?

Computer went bad, so had to upgrade to Win 10 and lost all my video processing sw, so now trying new free sw for creating DVDs. I'm currently using avidemux for cutting commercials from TV recordings, and saving as .mpg file. But now here is the issue:

Every burning sw I've tried so far skews the audio in some parts of the video, so that there is a very noticeable delay between the audio and video. In this case, when it happens the video lags audio by up to 1 sec. For whatever reason, it aligns later, then skews again, maybe 10 times throughout.

I've tried WinX DVD and DivX DVD Converter which both do it. I tried other burning sw, but can't get any of them to work at all. The resulting file from Avidemux doesn't have any skew, whether it is saved as mpg or vob.

I'm not tech savvy, so some of the options in the progs are greek to me, and I just leave all that at default. But I am wondering if there is some codec that I'm missing. These burning progs don't necessarily give an option to control which video codec unless it's something I don't understand. The audio is ac3. But beside of that, I really don't know what's going on with this.

Does anyone have experience with this and can tell me how to fix this issue?

 

A little bit more info after some experimenting: I burned 2 disks of the same movie, one with WinX DVD and the other with DVD Flick. I've been comparing audio skew at a certain spot 16 min. into the film, and here are the results I see:
1. The WinX (Disk 1) shows skew on the DVD player, but not in the computer running VLC. (this is weird, I don't get it).
2. The DVD Flick (Disk 2) shows skew running both.
3. If I play only the VOB in question on disk 1 in computer with VLC player, no skew.
4. Disk 2 in computer with VLC playing only the VOB, it has skew.
5. I converted the original mpg (no skew) using DivXtoDVD converter (saves as DVD files but doesn't burn) - the vob in this one also shows skew in the same place.

I really don't understand how disk 1 can show skew in the DVD player but not in the computer, and even in exactly the same place as disk 2 shows the skew. This is beyond me. Seems like there ought to be come consistency.