I hate to hear about those kinds of dealers. They really do a disservice to all of us. There will be some customers with problems who will associate this dealer's M.O. with Kubota's image and even worse it may sour them on their tractor altogether. I remember your crooked loader problem... as far as I'm concerned any problem you have in the first 30 days (especially one that obvious) the dealer should be willing to make it right at no obligation to you, regardless of what it may cost them. They should figure on those kinds of contingencies as a cost of doing business and maintaining lasting customer relationships.
If I had to hazard a guess based on nothing other that what I can infer, I'd say this owner isn't the original owner (e.g., a relative of whoever started the business) and may only be interested in what they can get out of it. And eventually they'll bleed it dry and run it into the ground.
Anyway, I hope your new seat works out great