Three of them knew all their spots, and only two of them was actually able to get them with a group (both being the classes that I said don't really need them anyways). The rest of them knew none or maybe one.
I've had several APs.....several and it hinges a lot around your wand spots. Most of my APs find them but sadly they can't get them. My most successful APs had two of the easiest spots (which ironically have been moved because they were too easy). My most deadly and best roleplayed AP I had (probably my duergar poet) found only his amber and it was a very very rough life because of that being a duergar versus maran. I've got logs of my fire AP with nearly 130 charges unable to get his own black solo.
It shouldn't be random for balance.