I've been having problem with quests regarding Draenor after crossing dark portal. Kargathar is always ahead of the place where you get and give quests, I was able to manage so far, but now can't find him anymore so I cannot do the rest of the quest chain. they all disappeared before the arena and cannot complete the kargathar proving grounds quest . the gates are all open meaning subsequent quests are done without even getting the quests. therefore I wont be able to get to the garrison. any help?