I got the letter today and interview on 12/11 (good, no crash with KV). My bbs are 0903. But I sent the form very early. So I guess they group the big bbs together.
My son is 0910 small boy, received the interview notice last week. I submitted the application may be the second day they start accept application.
May be you can check with the school.
I was unable to receive one of the letter from another school. I called the school 3 days after the date the school stated they will send out the letters. They said the letter was sent out on the last date. Then the school gave me my son's application # and date+time.