THRID FLOOR

I CAN'T FIND THE THRID FLOOR OF ALL THINGS. I NEED TO GET THE DOOR!! WHERE IS THE DOOR WITH THE CLAW MARKS ON THE THRID FLOOR????

Every time you come up a floor, you have to immediately turn around to access the stairs to the next level up...or go across the hall to the other side, but that's a bit of a waste.

And I don't remember a door with claw marks.