Duplicate movie (instead of versions), with collection to add insult to injury

[Iskelderon]

Any idea why I end up with an unnecessary collection containing two instances of the same movie, with the movie than offering the version dropdown just fine?

Code:

H:\Video_other\D\Der Schuh des Manitu (2001) [tmdbid-8366] [imdbid-tt0248408]\Der Schuh des Manitu - [Extra Large].mkv
H:\Video_other\D\Der Schuh des Manitu (2001) [tmdbid-8366] [imdbid-tt0248408]\Der Schuh des Manitu - [Standard].mkv

Of course, like with so many other problems we're talking about version 10.8.13

[TheDreadPirate]

Did you enable this setting in your library settings?

   

[Iskelderon]

Did you enable this setting in your library settings?

I don't even have that option there.
It jumps straight from "Prefer embedded titles over filenames and "Enable real time monitoring" to the  metadata source lists for TV shows and movies and then to "Automatically refresh metadata from the internet" after the metadata download sections.
I vaguely remember removing a plugin that led to the program pumping out duplicate collections with rather similar names, but that was a while ago.

From a layman's perspective: The problem here seems to stem from it initially pibling up two files in the movie's folder, generating two entries, which probably triggers the collection generation, but when the "Merge All Movies" task comes around, it now merges the versions, but doesn't flatten the display of the movie as one item again and remove the single-movie collection container that's now there.

The weird thing is that it works for other movies where I have multiple versions (though I need to use the square brackets so it reliably sees the versions as intended), but in this specific case, the program just doesn't get it.

[TheDreadPirate]

What library type are you using? Is it a movies library type or mixed?

[Iskelderon]

What library type are you using?  Is it a movies library type or mixed?

Mixed, I only separate the movies and shows by language type, because otherwise it would flood my screen. 
Merely music and audiobooks (both music type libraries) are in just one section each.
   

[TheDreadPirate]

Ah. That's why you don't have the option in my screenshot. I only use shows and movies libraries.

Only the movies library type supports "versions".

[Iskelderon]

Ah.  That's why you don't have the option in my screenshot.  I only use shows and movies libraries.

Only the movies library type supports "versions".

Strangely, the versions work just fine with other movies, it's only this case where it fails and rather impressively to boot.

[TheDreadPirate]

The mixed library type is a legacy feature and is not well supported. Another thing I just noticed is that you have content nested in folders for the letter. Nesting folders is not supported and will cause inconsistent identification and inconsistent behavior for things like "versions".

I'm assuming one of your library roots is "H:\Video_other" from your first post.

[Iskelderon]

The mixed library type is a legacy feature and is not well supported. Another thing I just noticed is that you have content nested in folders for the letter. Nesting folders is not supported and will cause inconsistent identification and inconsistent behavior for things like "versions".

I'm assuming one of your library roots is "H:\Video_other" from your first post.

Don't worry, those letter subfolders are the languages, a folder on multiple drives for German stuff, for Spanish stuff and so on. They're basically the language markers, so "E:\Video_other\CN" and "I:\Video_other\CN" are added as source folders to the Chinese library, similar stuff going on with the French, Italian and other languages and so on. Right now, I'm up to drive letter M.

For example:
"E:\Video_other\D"
"E:\Video_other\J"
"E:\Video_other\K"
"E:\Video_other\CN"
"F:\Video_other\K"
"F:\Video_other\D"
"F:\Video_other\J"
"G:\Video_other\NL"
"G:\Video_other\D"
"G:\Video_other\ESP"
"G:\Video_other\I"
"G:\Video_other\J"

[TheDreadPirate]

Ah. That's ok then.

The only other suggestion I have is to remove the IMDB ID from the folder name. Jellyfin does not make use of IMDB for metadata, but we do use it for identification on TMDB since TMDB maps IMDB IDs to TMDB IDs. BUT, sometimes that mapping is wrong.