OP, if you reserve a dedicated 2 bedroom it will say it on the reservation. I had a dedicated 2 bedroom in November this past year and this is how it would look:
Arrival Date 10.31.2010
Departure Date 11.04.2010
Resort / Experience Bay Lake Tower at Disney's Contemporary Resort
Accommodation Ded.2BR Standard View
Reservation Number ********8311
Vacation Points Used 140
If it doesn't have the "Ded" on it, then you most likely have a lock-off which means 1 Q bed and a Full size sleep sofa in the second bedroom.
Have your member look at their "upcoming" reservations to see if the "Ded" is listed on their reservations.