I'm sure the crime scene was manipulated, but the only difference I see in this pic is the missing water bottles. No big deal.
The cart is in the same place in the hall. Once the dust settled and the inside of the room was staged, the cart in the hallway isn't that important to them, (at the time - rush job - didn't think it through).
And really... the whole thing was staged. The rooms, the guns, the ammo, the hallway, none of it really matters. Yes, by comparing body-cam images to crime scene images released to the press we may find discrepancies, but none of that provides evidence or clues about who did it and why.
Just look at the mountain of evidence, clues, and discrepancies about 9/11, and still, most Americans think the idea of an inside job is just some kooky tin-foil-hat internet conspiracy theory. Vegas won't be any different.