Why DD 2/0 audio listed twice?

[Cheddar]

For all my TV series DVDs, DD 2/0 is listed twice. I know the second one is for Commentary but some episodes don't have Commentary and it's still listed. What is the difference?

[Smithcraft]

It depends on how the disc is mastered.

Since there is most likely a "Play All" feature, some times when these are mastered they include a blank track to fill in a for the missing commentary track that might not be in every episode.

SC

[Woodstock]

What Smithcraft said.

Wait until you find a disk mastered with a stereo audio track but 5.1 audio for the commentary, and MakeMKV chooses the higher-quality by default!