Duplicate TV show episodes and movies in iTunes

Hi,

iTunes is asking me to download several episodes of Game of Thrones season 1 that I already have downloaded. So I did download just to see what's up. It turns out that some of the 'Info' is different in the new episodes being downloaded (e.g. one file has the Album as 'Game of Thrones' and the other has 'Game of Thrones, Season 1').

Has anyone else faced this problem?

What can I do to remove the duplicate episodes?