It definately looks odd, But it appears that the tank is designed for this installation. The cover plate appears to be oriented correctly. I wonder if BW makes a model that is bracketed to the wall like that?
However I think its someones clever Photoshop work. I can't find any model like that. A wall mounted unit would be square or mounted in a wall hung tray of some sort.
The manual indicates that the Hot side nipple was also the anode rod. The replacement part that I found on the link for the prior model shows that it wasn't drawing hot water off the top of the tank somehow.