Hmm, must admit that I've never experienced an issues as such.

The only thing I can think of is, make sure the names of those troublemakers are in order (no extra characters in front, such as spaces), because that is what your bookmark (BM) drop-down menu lists (the names, not the URLs).

I always edit the name, while bookmarking (upper case, always).

If that does not work, and before you go do something terrible ... like have a smoke, you may want to number the BMs (place the number plus one space just before the name) in the order you want them to appear ?

***BOOKMARKS***
1 PICTURES OF DIRTY ASHTRAYS
2 PICTURES OF CAJUN LUNGS
3 PICTURES OF CARPET BURNS
4 PICTURES OF PACO POINTING UP
5 PICTURES OF PACO POINTING DOWN
6 PICTURES OF PACO POINTING STRAIGHT AHEAD (OUT)
7 PICTURES OF DONMIKE BEING BOOZE-WOOED BY LEE
8 PICTURES OF DONMIKE ON HIS BACK WITH ALL FOURS UP IN THE AIR
9 PICTURES OF DONMIKE RIDING THE SPRING-PONY (maybe wrong about the type of mythical creature).
10 PICS OF THE SPRING-PONY RIDING DONMIKE