I assume you mean muxing errors in DVDSP? I've had the same issues.
I personally really like using BitVice - it gives very nice results at relatively low bitrates - but have found that it isn't worth using unless you have a lot of material that you need to squeeze on one disc and/or have lots of time to turn on extra features and render (overnight, usually).
The muxing errors do arrive in DVDSP. But it is only on the material encoded by Compression Master. As for BitVice, I was surprised that the quality wasn't near what Compressor did. It was the trial version but I expected better results. I must be doing something wrong.
It seems no one uses Compression Master as I haven't gotten a response on ANY board about it.