SOLVED: Version Separating Multi-Part movies

[TheDreadPirate]

For Batman, since the file names and the FOLDER name do not match, you have not triggered the versions function.

For the versions function to be trigger, the folder name and the file name need to match. And for the file name, that only applies prior to the dash used to separate the movie title from the version title.

Since the folder and name of the files match PRIOR to the dash (Nyphomaniac-) you are triggering the versions function.

Having multiple, distinct, movies in the same folder is not supported. Distinct movies need to be in their own folders or in the movie library root folder (with all the limitations the latter entails).

https://jellyfin.org/docs/general/server/media/movies/