I would contact Jayco directly from there website. I have a 2012 TSBH which is pretty similar to yours. One day I decided to try to convert the dinette to a bed. Not that I needed to since I have the queen up front, the sofa bed, 4 bunks in the back as well as the trundle bed option. Anyways, the table top fit as it should, but I fought arranging the cushions to make the mattress. I finally called Jayco and she explained how to do it. I have forgotten how she said to do it, but like I said, it was a matter of principle, not need. That said, if it should convert, it should convert. You shouldn't have to modify anything. Sounds like your dealer doesn't want to go through the hassle of getting it done right. Maybe it isn't suppose to convert, but if it is, have them make it right! Good luck.