"Upload Listing No Image"

In Geo Directory under designs/listings there is a provision for uploading an image file labeled as “Upload listing no image”. My thought was that this would be the default image used for someone who might come along create a listing but at the the time didn’t have their images ready. A place holder as it were. I tested this out but such does not appear to be the case.
I created a new listing called “Jack Hammer Dentistry” that can be seen on the home page under the new listings section at http://themindproject.net but it’s using the category icon image. Where did I go
wrong in my understanding/implementation. I would like to have a placeholder image of some quality to be used if the person who is creating the listing doesn’t have images in their possession at the time.

Thanks in advance
Dan