I just got my FOL today! It didn't mention anything about a projected OKC date. Did the projected start come in your FOL? Or was that a different email/phone call?
I did also reach out to Kim and ask about using a projected date in order to reserve a spot there. She said that a projected date works, there is no monetary deposit necessary, and that it is ok if the actual in-person start date moves, just to let her know when we find out. That being said, I filled out a reservation request for Kim's place using the projected start date that you got.