This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
In my book, the display on the wall above the shelves is called "signage." So, in current slang (as trolley has pointed out) I would call this a "signage fail." On the other hand, since the stuff on the shelves is moveable, and the sign(age) above is less so, this could be called an assistant manager fail.ACCESS_POST_ACTIONS