Just a clarification on something written above: adjoining and connecting means the same thing. Adjacent rooms are next to each other with no connecting door.
Also, Disney seems to be the worst hotel operator on the planet in terms of properly addressing guest requests (e.g. adjoining rooms, high floor, away from elevator, specific view or bed configuration, etc.). The CMs at the front desk can often sort things out, but I've not had great experiences with requests made in advance, and when I call a few days in advance like others have suggested I usually get the {requests are just that and are not guaranteed) brush-off.