I've mentioned this before, but it didn't seem to get any traction. Now that I've got the right software, I did a video capture of the relevant menu behavior, slowed it down 10x, and blew it up 2x.
Basically, when you click on a list in the Favorites, it populates very quickly in one order (reverse alphabetical?) then changes very quickly to a different order (alphabetical?). This is reversed when you click to close the list. The movement is somewhat distracting, and I don't know if it’s a feature or a bug.
It's more pronounced with my second list in the video, because it's longer. Check it out, 6Mb from my Cloud account.
http://cl.ly/2Y1C3G3P0j1X