Hmmm
my sister used expedia and she too got no real disney number either, and she had to call expedia direct
and set up her own Magical Express also,
and call to get her reservation at disney as far as requests....
She had to call them directly, and they gave her the number verbally, then she called disney to confirm and all was okay!

Hope this helped!
As an aside, she was told by disney that they would not speak with her about anything since it was not booked thru them

, then explained she has handicapped family member and I guess they took pity?? cause they then helped her. Personally Id only book thru disney..not worth the small savings IMHO
Have a great trip!