I read that when doing the subclass quests, if you have already maxed out that particular tree, you will automatically get credit for that step of the quest and move on to the next. This worked fine when doing Path of the Bladedancer, but I reached that step on Path of the Gunslinger and I'm not receiving credit for being maxed in the Gunslinger tree. HALP! UPDATE: The problem has since fixed itself. I'm not sure what finally caused the quest to register I was maxed out, perhaps just exiting the game and coming back in? Hopefully if anybody else runs into this issue, they can find a quick fix for it.