I'm currently in the middle of an Aladdin and the Oil Lamp adv. It appears to have been changed (the empty leader camp is gone). I've done this adv a week or two ago so I'm sure it wasn't this way originally. The change itself is no big deal, few extra losses maybe but no big deal. However, now the quest associated with killing the leader (that's no longer there) is bugged. It says I have killed 6/6 sailor camps, even though I'm pretty sure I've only killed 5, and it won't give me the new quest even though it says I'm done.

http://prntscr.com/9mfgf6

I'm clearing to the end and will probably kill an extra sailor leader to see if that gives me credit, but as it stands now, I have no real indication of how to finish the adv.

Sedren

Update: Just killed the final leader and still stuck on a quest it says is complete.
Update #2: Went back and killed an extra leader, so it appears you do need to kill an extra. It just needs to be updated so that you aren't getting credit for a non-existent camp.