Hi,
I asked member services this same question last week!
The answer I got was that if you ring on the 11 month window for the studio you can only book the studio as it is a different type of accomodation, so you can't book for the 7 days. You would have to ring back on the right day for the 11 month window for the 1 bedroom. So studio one day, then one bedroom the next.
I was however, told that you could get away with waiting until the next day, then you could book the studio and 1 bedroom in the same call, as you are at the 11 month mark for the 1 bedroom and just past it for the studio, she said that at 11 months there would be no trouble booking a studio just a day late at such a large resort.
Hope this helps,
Sid