I just booked 10 nights at the 11 mo window but it is the same policy. The first call is to book the 7 nights, and the next 3 calls are to book day by day. In reality, you are calling 4 days in a row. The only other option is to wait until day 4 and book the extra 3 days at once. Not sure when you are going or how booked they will be. For next July, we called day by day. Good luck!