All of the lists around here are crazy like that. My list of friends is not in any particular order, other than possibly backwards order of how I added them. (There's not many so that's pretty easy to figure out, but that could be coincidence.) But they aren't alphabetical, or by how often I play with them, etc.
It's just like the games, which are just random and seem to change.
And I find the members of a group to be just as annoying. I have a group and there's getting to be enough members that I can't remember who was already on there and who is new, and I have another list where I'm marking who joined from their invitation. Again, these aren't in order they joined, nor alphabetical, and it seems really random. The bigger that lists gets, the harder it's going to be for me.
I don't know what the problem with lists is around here.