I am trying to get the Krytan Explorer achievement in Guild Wars 2 but I am stuck in the Brigantine Isles. Looking at the list of areas to explore for the achievement, I see that there are two entries for Brigantine Isles:
I don't understand where the second one in the list would be. Looking at my map, I don't see any areas I might have obviously missed:
I have also tried swimming around the area to make sure I didn't forget any underwater area. So, where is this second Gendarran Fields: Brigantine Isles area?