Well, generally, on oveworld type Dmaps, the exit is on the lower side, and on Dungeon type Dmaps, it's on the upper side. I don't recall how Cave Dmaps handle it.When you go to an item room, you can't get back, and if you can get back from anywhere, theres no proper warp return set, so Link appears at the upperleft corner.
So all you'd have to do is switch that screen from the exit being on the top, to being on the bottom, and you'd be good to go.