Always include the release year in round parentheses. This is the absolute minimum.
Particularly if the title starts with numbers.
I urge you to put every movie into its own subfolder, named after the same pattern.
This is very important if you use arbitrary subfolders, like the above Kids\
(if the Plex library is actually pointed at Shared Movies\
)
This will also speed up library scans and general library browsing in large collections.
If Plex has already mismatched a certain movie, you might have to perform the Plex Dance to make it forget the wrong match.