versions show as separate titles for some movies

[Efficient_Good_5784]

Which raises the question: What's different about the files that Jellyfin does display properly with both vertical and horizontal size and the ones that it doesn't? I'll take a look at my library and see if anything obvious stands out

Most likely the parser can't tell it's a resolution and treats it as part of the file's name.

Like the string "1920x1080p" makes sense and is understood, but "1920x960p" is not parsed right and is assumed as a movie name.

As an example, I've seen people number their seasons and episodes with "01x01" for season 1 episode 1.