OK so the store manager gives me some more info on this girl. Apparently this girl has produced before. They got her from a local breeder that was shedding some excess stock. I took a closer look at her rear area and it does appear to be the case. It's somewhat concave down there. Not the flatness I see in videos but still concave. Chloe never looked or felt like that.

I took some pics at lunch and asked my wife to email them to me so I could post then here. We'll see what happens.