Knowing that script won't work is also important knowing !
So i done few more tests with VOB clips.
In Hybrid force setting "Frame Rate" to 25fps or Enabling "Adjust to Stream Framerate" or "Ignore Timecodes" in Muxing->Automation don't make any difference.
This is what i see in media inspector - same frame count, but 25 fps became 50fps after remuxing:
To compare i also attempt to remux same VOB to MKV with Remux app and it give me an error. So part of the problem may be due incorrectly extracted source VOB as you noticed.
Same VOB remuxed to MKV with MKVToolNix v53 app don't have any speed changes.
Same VOB remuxed in Hybrid to .TS don't have any speed changes.
Same VOB remuxed with Remux app to .TS don't have any speed changes.
Same VOB transcoded in Hybrid to x264 .MKV with audio passtrough don't have any speed changes.