@Jeremiah The list of available output zones is not sorted in any particular order I can see, and it seems to change, e.g. when one zone is removed or added, the others jump around. And I think it is different on different remotes.
Similarly with versions of an album: random order, and when I make one Primary, the all move around, not putting the Primary at the top, just another random order.
Minor nit, but it invalidates visual memory.