Downton Abbey - Remove Extra Episodes
Seasons 2 - 5 all have an Episode 9 recently added. These are already present under Specials.
I think these are popping up because TVDB supports multiple season types now. So there is an official season ordering, with specials in Season 0 (Specials) and there is a DVD ordering with the specials included in the season as Episode 9.
I don't know how Trakt is supporting this, what their policy is.
They have the same episode IDs. I marked the specials watched in my history but episode 9s are not. So something is wrong in how Trakt is handling this.
Jessica Moss commented
The episodes have been removed from the TVDB. Also, in Specials episodes 15-20 need to be deleted. They are duplicates.
Duplicated episodes need to be removed @ TVDb