Hi Rudy,
thank you very much for your help!
Even though I have to admit that I don't completely understand everything you said, I think what you're talking about is not the same issue I'm experiencing.
Maybe I should give some more details?
First of all, this is happening in multiple series I'm trying to add to the library (I cannot confirm that it's happening to every single one, but definitely multiple ones)
Using Charlie's Angels (Season 1, 23 episodes) as an example;
The filenames are: Charlie's Angels.S01E01.mkv to Charlie's Angels.S01E23.mkv
Using MC 20 I've "Removed Tags" and "Cleaned file properties"
The folder they're in is empty, apart from the 23 episode MKV's.
I select all and run "Get movie and TV info"
Charlie's Angels.S01E01.mkv which had an empty "Name" tag now has "name": Hellride (Which is actually episode 2, not 1:
http://en.wikipedia.org/wiki/List_of_Charlie%27s_Angels_episodes)
Charlie's Angels.S01E02.mkv got "Name": The Mexican Connection (Which is actually episode 3)
Charlie's Angels.S01E23.mkv got "Name": Charlie's Angels S1e23
I hope this helps... Thanks in advance again!