It's nothing to worry about. Nothing is vague in their post, it is very clearly stated, just don't look beyond what they are saying. They specifically stated faction quests and patrol quests. The subclass quests are neither of the two, so that's it, no glitch here. As far as not being able to turn in faction quests, maybe some people glitched into turning them in and it's a small minority? Not sure, but I can promise you the subclass quest is fine.