Hey! I'm in the same position... it shows an "Outstanding Admissions Deposit" under the Finances portion of Acorn (our student portal) and then says that you must accept your admission offer and also pay the balance to hold your place in the program. But I also haven't received an official acceptance.
Hey! I'm also currently an undergrad student at U of T and I have this showing on my Acorn Finances page too, but my profile for OISE still says under review? Quite confusing, but hopefully a good sign!