Adding a ticker for shows that has been marked as checked in!

Hi, Everytime I add a movie/show to my “check in” list, it doesn’t notify me that if it’s already added to the list before or not, and thus it duplicates it… I end up forgetting if I ever added this movie/show to my “check in” list before or not coz it doesn’t show a ticker on it that it’s already added to it… just like the “added to watchlist” ticker for instance! Thanks