Because I always used Media, not Album, never realized what it was all about. So, guess this exercise helped me learn Now when I get the “missing items” I see how they can be used.
Maybe, but it doesn’t help explain why some types are missing from you album, configuration. I’ve never seen it happen on any other installation. There should always be the full list of 18 types down the left. It makes no difference if there are ‘missing items’ or not. There is no check in the code to see if each type is used.
Have you tries the ‘reset’ button on the album config page?