That is awesome!!
I sort of had the opposite experience. I booked DL Hotel back in February after race registration for just me, so booked a standard 1 king room. I called in March to add a 2nd person to the room and requested 2 queen beds. Then called a couple of weeks ago to add a 3rd name to the room. Was told that my room type didn't allow 3 people. Turns out they did not change my room to 2 queen beds. They told me the hotel was sold out due to RunDisney. Put me on hold, came back and said they found one room left that is a Premium View room for ~$100 more per night and that was my only option to add the 3rd person to the room, even though there were notes on the reservation from March that two beds were requested.
I'm pretty salty about paying $400 more! But, not sure if it's worth it to try to get them to honor the original price.