I have that same show on 9.0.3 and it scans fine.
I do have the year in the folder “When They See Us (2019)” but doesn’t explain why you have multiple instances.
It’s nearly always something screwy with the files so check in /settings/media/library/videos/tv/showname/ then do information on an episode, then move cursor over “refresh” on the bottom navigation, and it will show at the bottom of the screen which file it is referring to.
(you could also get to “refresh” the short way through normal navigation under tv shows)
Another way to find out what it is, is remove (move) just that show from your scanned library, do a clean and see what’s left.
If there are still shows showing up, you know it’s from another folder being picked up as that show.
Then just follow what file(s) the culprits are via the method I mention above.