Its a bug, plain and simple, either in Apple TV or iTunes (both were simultaneously updated, so I cannot say which update caused the problem). But I have used iTunes and Apple TV as the basis for my media hub for years. I have thousands of TV shows, music and movies, a mix of iTunes and self-ripped. I have the entire library meticulously configured, with each metadata field matching, both in content and style, for every single entry. Now, suddenly, it stopped sorting correctly after the update(s). I have had first gen and second gen Apple TV's, running a host of different versions of the OS. This is the first time that the TV shows went out of order like this.