Originally Posted by
Nayt
If your character is dual-spec'd you can end up with lower ranked spells on your bar. Any normal person will level, go to their trainer and learn everything available. Usually WoW will update all of the spells on your bars, as it should. Well if you are dual-spec'd the game will only update the spells on the bars of your current spec. Meening that when you swap over to your second spec, whichever spells you had there before are the same ones that are on your bar now. They didn't update, because you weren't using that spec when you learned your new abilities.
Every time I train on one of my toons now, I have to swap into my dual-spec and go down the list of what I just learned, manually replacing any abilities that I just upgraded to the new highest rank.