Doesn't sound right. Cleats that hold seats and benches are generally glued to the side walls with epoxy putty. Sometimes (sometimes) cleats are held in place with screws just long enough for the glue/putty to harden, and then the screws are backed out. But I doubt Jason does it that way, ever. In fact I know he doesn't.
Jason sells his kits with an instruction manual. Didn't you get that when you bought the boat? You should be able to coax one out of Jason, one way or another. Have you tried to contact Jason?