Yeah, you're right. But there are still erratic behaviors. In all cases, after creating a TV series and scanning the files, Emby ALWAYS assigns to ALL TV series the poster and the name of... Wicked Tuna! (which is what appears in the tvshow.nfo file). I have to fix them one by one, setting the identity by entering the rightful series name and IMDB id.
As serie metadata downloaders I have: TheMovieDB and The Open Movie Database.
As season metadata downloaders I have: TheMovieDB.
And as metadata downloaders of episodes I have: TheMovieDB and The Open Movie Database.
I think they are probably just being merged due to having the same tvdb id's on the series, which could be caused by nfo files created by previous scans. If you go into your settings for the TV library and uncheck the option to automatically merge series, then run a library scan, I bet this will be resolved.
Please let us know if this helps. Thanks !