This is so odd! I installed this on a brand new Wordpress install and then imported some content. The first listing I created is working fine, but when I added a second one, things went haywire. It replaces the 1st listing, and then replaces the listing title "Test 2" with "ListingListingListing" and also in my recent post sidebar widget, it replaces all the post titles there with the word "LISTING" also.
I noticed that when I put "Test 2" post into trash, "Test 1" shows up properly again. However, if I put Test 1 in trash, Test 2 still jacks the listing page.
I'm stumped. Of course, I'm supposed to have a functional demo ready for a client meeting tomorrow... Any clues?