Trailers work for 1 Category but not the other

[OttoKerner]

Judging by your description, something is seriously out of whack.

Short of uninstalling everything, you could first try this procedure. See if it gets things back into order:

[HowTo] Reset metadata agent preferences to defaults and whack caches

originally provided in an older forum post here Possible to reset Plex settings, but not media information? This procedure only affects the old Python-based (Legacy) metadata agents. Do the following: quit Plex server go to the Plex data folder dive down into the subfolder Plug-in Support/Caches and erase every subfolder in there then go back to the Plex data folder and go down into the subfolder Plug-in Support/Metadata Combination. In there, again erase all subfolders. go back into the pl…