add a check next to your lists a film is on
I have some films in more than one list, and some I'm not sure if I've added to a list or not. As it stands my options are to look at the list or attempt to add it and see if it generates an error or not. It would be helpful if you implemented some sort of indicator next to the list name in the lists menu for a film that lets you know that film has already been added to the list, similar to the check mark used by IMDB.
As a film can only be added to a single list, it probably makes more sense to disable or grey out the list titles for lists that the film is already in.
Gypsy Darkness commented
I have films on multiple lists now, and I'm glad I can have them that way, I hope that won't be changing, I just wish I could see which lists I've already added them to. Thanks for the response, and I'm looking forward to the improvements. :)