Yes, that reply was a bad one. Every customer should get nothing more, nothing less then what is paid for. You did not pay for a "blemished" unit, so, yes, yours should be perfect. If I bought one, I'd expect nothing less from MD or VPI. They get good press, so they should live up to nothing less then "the best" in product or customer service.
Right now, I'd say shame on MD. Many ways to handle this one and they, in my opinion, dropped the ball. So I think you are certainly on the right track, getting VPI directly involved. Your problem will get fixed and eventually, you will be a happy camper. You got a great table, at a discount, with a few bugs to get worked out (that you should not have had to).
The winner in almost every case like this is the one that perseveres the goal. An easy fix for MD was to send your unit back (I'm sure at your expense) and wash their hands of it. WRONG!
I do lots of business with MD, but I certainly can't defend this. I couldn't defend any business in my small town to do what they did.
All I can say is move on and 'get r done!
Wayner