I'm not certain, but I believe that the only two Deluxe rooms that adjoin are 3227 and 3229. I got that information from Cara Goldsbury's site that's linked on the first page.
That's correct! Connecting means they would have a connecting door.
This is where I got confused. My understanding of the Deluxe room layout is that 3225/3227/3229 (3rd floor above the Boardwalk Bakery) and 4225/4227/4229 (4th floor above the Boardwalk Bakery) are all Deluxe CL rooms (which would be more than 2 rooms adjoining)--I couldn't understand why you were pointing out only a few as adjoining if more actually do adjoin. I could be completely wrong about 3225 and 4225-7 being Deluxe CL rooms, by the way, as we've never stayed in those.