Haunlet Runner Bug

I am a Rogue level 20 ( Mauziscab ) I did the haunlet with my guild <Genesis> and finished it about 3 times before 90 seconds, but Both me and my guild mate (Amshara), who managed to do so for the first time, did not manage to receive the haunlet runner achievement. Could you get someone to look into it? And has anyone encountered the same problem? Done on 9/2/13.

Wrong section. You need to CROSS the line in less than 90 seconds, not just kill the boss, and not let someone else cross the line for you (like you can do with coins). The ms also count (finished it once 283ms over).