NPC Spawn Issue: Pawduster-Karnors Monk Epic

[Silentone]

so with the combind effort of my guild we manged to keep pawbuster camped from 5am pst on saturday to 7pm pst on monday night. where pawbuster spawned. I just wanted to sum up what it took for us to get him. 27min a spawn if he is only supposed to spawn from one of the 2nd bodyguard from the door then thats 2 spawns per hour about, if it can spawn from any of the BG ph's then its about 8 spawns per hour. we had about 62 hours logged non stop if my math is correct. thats a lot of PH's .... i never remember paw being such a bottle neck on live. Is something off on this ? or did i just get extremely unlucky?

PS: from the 3 monks that I did ask they all confirmed it spawnd off the same PH, which was the 2nd on the left as you walk in the door.