So just to add more background info for others...
Booked standard king 'deluxe' room on 'Luxury Weekends' rate (was cheapest at time of booking).
Didn't get my usual confirmation email from Ambassador reservations, or the hotel. Quick email and upgraded to king Premier.
A side note, I'm getting a little annoyed that even though I specify non-smoking in bookings they always book me under smoking room in the reservation. Grr.