I am new to this great program, and I am still learning.
The reason I started with this program is to sort out duplicates of the same movie. Lets say I have a dvd and a blue ray and even a vhs of the same movie title how can I make a list of any duplicate titles?
For video files, you can use the menu "Tools->Manage your video files->Find duplicate video files".
Unfortunately it won't work for physical medias. It's at the moment when you add a DVD that you're supposed to notice if it's a duplicate. You're also supposed to use the app to prevent buying duplicates.
And to show the total amount of movies in my collection and not just the total amount of titles that I own.
The app does that by default. It counts the number of owned movies, independantly of whether you own multiple copies of the same movie.