The infestation has returned. Fort Elena is bugged. Again.
I got the quest 'Saving Mustang Sally' from Catbeard. It requires me to 'find entrance at Fort Elena', which upon completion gives me the quest 'Flight of The Penguin'. When I complete 'Flight of The Penguin' (the entire Fort Elena dungeon) my quest is right back to 'Saving Mustang Sally' and the quest arrow directs me to a point in dungeon next to Lieutenant Benedict (is that his name?).
This happened twice, both times I completed it with a friend. Please fix this ASAP. Completing Elena three times in a row is not overly pleasant.