I was soloing in shor yesterday dc and we had a massive battle going on at Nikel, anyways I had about 25 kills on the whitestrake achievement and had just picked up the kill 40 players quest which I'd knocked a few off it already. Anyways ad burst through the door and they couldn't get all the way through to the flag, I drop an elemental rage right in the middle and the kills I got must have been close to 30 in the 9 seconds it was active, the quest ticked them off 1 at a time and completed but my whitestrake achievement only went up to 32, is that a bug or is it like last hits only count?

Just to add, after this went down to castle roebeck on my lonesome and found 1 guy attacking it, he had 2 siege units up and was just running between them both with no one else around, what a hero!