Another +1 from Belgium
It's a bit strange, sometimes it seems like I *do* manage to have them appear in the stacking order when I hit publish.
If they are initially sorted by name, sort them by something else, preferably that's empty (Path from selected folder, in my case).
Then hit a few times the Show all items checkbox and presto!
It's on the lines of vodoo magic, so no gurantees this will work for other scenarios.