i think one of the globals has been dispelled or ended in some way, but remains on the list. i've seen that happen before.
globals are a very mysterious bunch.
I'm in a 3.10 game at this moment... 5 globals were active and at the start of the next turn 3 new globals were casted successfully. The end result was 5 active globals.
I'm not sure what combination provides 6 globals, but I'm sure some of the hardcore gamers are hunting for the secret combination.