I just completed a backup of Space 1999 disc 1 which contains 3 Episodes.
I don't know if this is worth mentioning but here goes. When I play Title 2 it is showing up in DVD Player info window as Title 3 and 3 is 2.
It does not affect playback. It is more a cosmetic thing.
In fact I am very pleased with the results.
Thank you for taking the time to make this available to the Mac community!