*UPDATE*
Picked up the camper from the dealer Friday and used it the weekend with no leaks. Dealer removed the forward grey tank (galley sink only) and found that the flexible drain hose that is connected to the tank had partially pulled out from the boot where it enters the tank. Also found a small leak in the fitting of a water line on top of the tank. The factory used a hose clamp in lieu of a crimp ring on the PEX water line.
A new boot for the tank and advice from Jayco on how to better secure the drain hose, a crimp ring and all is well as far as that goes. Still doesn't explain where all that water came from. Paid nothing on the bill. Waiting for them to submit for warranty.
As he printed the paperwork, I asked the SM if they had secured the belly cover like it was. He said "yea, they got it taped up really well."
HUH? What? "Yea, go look at it and see what you think." Went to have a look and they cut a 4'x7' hole in the belly cover instead of removing the screws and doing it the right way. I told the SM that it had too much sag and would blow off going down the road. He sent the mechanic out with an 12' section of aluminum and he fixed it somewhat better. It did not blow off during the 200 mile trip home. I'll fix it right in the next week or two.