Season 5 of Chuck, last 2 episodes.

[Phalaris]

I have a really odd issue, and I'm not sure how to solve it. I have all 5 seasons of the TV show "Chuck."  In my TV Shows folder, I have the main folder called Chuck. Below that, it has 5 folders named Season 1, Season 2, etc all the way to Season 5. In each Season folder, my files are named "Chuck S01 E01" etc...

Now, here's where it gets weird. For every episode, and every season, with the exception of Season 5, Episode 12 & 13, show fine in my Jellyfin.  But for some reason, it lists Chuck S05 E12.mkv & Chuck S05 E13.mkv twice when I show the episodes for each season. There is physically only one file for each episode, but somehow Jellyfin shows them twice, and if you play them, will play each of those episodes, twice.

Also, Only Chuck has this issue. None of my movies, or other TV shows are doing this.

[theguymadmax]

I would try moving the chuck series folder out of the series library on your hard drive.  Perform a scan all libraries from the dashboard in Jellyfin to make sure it's removed, then move back the folder.