Allen already notice that those Warriors who previously went to the second floor to kill the Boss monster already came back and naturally he already get the notification that they have killed the Boss monster. So with that everyone of them already prepare to go to the next floor or you can say the final floor where they will naturally face those level 5 Monsters.
It did not take them that much time to reach the next floor and naturally once again they begin to kill everyone of those Monsters wasting no time. But the thing was that the surrounding area was same as the previous floor so everyone of them also know that they won't able to find anything in that floor.