Follow the steps I previously mentioned to resolve the situation. When performing the Plex Dance, return the movies to the library one at a time.
You can also Split Apart and Fix Match. However, the real fix is to name and organize your media appropriately. FYI, if Fix Match has trouble finding the correct movie, click on Search Options and use the IMDB ID (ex: tt12345) instead of the movie title to search for a match.
There are several tools on the market that can assist with renaming and reorganizing your media. Two that are often mentioned in the forum are Tiny Media Manager and FileBot. Microsoft Power Rename, part of PowerToys, can help with simple pattern matching / replacing.
