Each of these interfaces have two areas of interaction. The larger area is that which allows a player to click the altar and open the exchange window. The smaller area is that which allows the player to actually make an exchange. This has the consequence of being able to open the window, not moving an inch, and getting a "The [thing] is out of range" message when trying to use it.

It's not clear to me why these are different in the first place, but my suggestion is that they be made the same.