Wrong audio stream (i.e. commentary track) is played by default for some films

[OttoKerner]

@spencebucfan

But for other accounts in my household (ie, my parents) Plex does not remember the correct audio track that I selected in my account.

That is normal, the track selection is stored per user account.

So we have here an example where the default mechanism to determine the best audio track is failing. I will file that as a bug.