Turn 5 Downed by JP Group? Exploits or Legit?

[Pellegri]

Checking XIVarmory.com Shows that AVID and Coffee Break FC's have beaten this fight also.

Check the player achievements for Rhowan Wanderer (Gilgamesh) and Defiant Of (Behemoth)

I'm curious to know if this is Legit or Bugged.

If they did it properly then mega Congrats!

Atleast one of those groups listed used the exploit on the fight(Square did nothing to that group and they kept the achievement). Going to be amazing when it comes out that all the groups so far have used the exploit and Square doesn't care enough to do anything about it, meaning if you want a kill use the exploit because it's alright by Square.