I have similar issues, so understand.
Best to let the CM know when you book your room (or call back now) that you have some medical special needs and will require raised toilet and grab rails in the bathroom. They will call special needs dept with you on the phone, and make the arrangements. POP does have HC rooms with 2 beds. You can also make a request for a certain bldg and if they have those rooms in that bldg will do their best to honor that request. Special Needs will block a room and be sure you get the type of room needed.
If you worked with a
travel agent just let your TA know and she will call.
If you do not feel your requests are met after speaking with a CM, call Special Resort Reservations: 407-939-7807 option 1. You must already have a reservation to speak with them, but the CM at regular reservations should be able to take care of everything for you.
Hope this helps! Have a great trip.