Everyone else won this achievement?

yesterday i left vashj'ir 140/150 because the quest Ascend No More! was bugged, so i went to deepholm.


today, i opened the achievement to see how far i get in deepholm and see that i did completed the vashj'ir achievement, but i didn't even got back there to do more 10 quests.


so, anyone else just won that achievement free without really doing the 150 quests needed?