Out of the Blue Sort

I don't know exactly what causes IE Favorites sort parts of itself out of the blue, but its driving me nuts.  I usually organize them in the order of my visits.  News aggregator is great, but its doesn't feel like a daily stroll through the neighborhood.  So I start with Scripting News and moving down the list in the order of "must read" to "occasionally interesting".  Except now, its A to Z.  Argh!.  I am this close to pausing all other projects and redoing Favorites the way I like it.