Looks like they're shown alphabetically. Adding a number to the beginning of the file name will put them in the order you want. Example: 1 Patton, 2 The Godfather, etc. Insert a movie into the existing order by adding a letter to the number. Example: 1 Patton, 1a Rambo, 2 The Godfather, etc.
I separated my home movies from my feature films this way.