Just looking at the pictures a couple things stand out to me. It looks like that wrinkle that is being created in the front on your left where the pauldron front snaps to the back is like your cause. Out of curiously, if you leave it unsnapped and make sure its laying down flat, does it still do it? It seems to be pulling weird and creating a lift. As I don't have a Pauldron hard from me to speak from experience, but that's what I notice just looking at the photo.