Jellyfin displaying duplicate missing files for episodes

[elephantLYFE]

Just my thoughts when I read this, but i have not encounter issue before.

I am assuming you have become familiar with the documentation on naming conventions for Shows.
https://jellyfin.org/docs/general/server/media/shows/

1st thing that seems odd to me is that you have 86 number & character eighty six.
What is the shows actual name? "86" or "86 Eighty Six" or "Eighty Six",
I can see that being a potential confusing name for the parser.

2nd thing that might need cleaning up, maybe the way you have episode
names appended, might be causing the parser confusion. "S01E01 - Undertaker".
Maybe Jellyfin is reading it as a part or a version.
Maybe try file same formatted such as "EightySix_S01E01_Undertaker",
assuming the folder structure follow convention, it should still know what the show is,
and if you still have issue, shorten it to "S01E01".

Good luck, anime is also where i seem to have issues with picking up correct metadata.