I've been going through several TV series on DVD and some of them have copy protection such that the duration of a title is incorrect. MakeMKV drops those titles and logs that they were fake. If I run the disc through WinX DVD Ripper and have it copy the DVD directories to disc it fixes that problem. Running MakeMKV against the disc directories then correctly finds all the titles.
Some examples are Numb3rs, Buffy from season 3 forward, and Andromeda.
Fake Titles often Real
Re: Fake Titles often Real
Recent versions of MakeMKV have multiple ways that DVDs can be scanned. It might be interesting to try the different modes with the problematic DVDs.
DVD opening modes - CellWalk, CellTrim, CellFull
DVD opening modes - CellWalk, CellTrim, CellFull