1. I have no evidence for this but I suspect that Osgoode just feels it has to keep up with U of T in terms of tuition. That said, we have more clinics than any other law school and the funding for them has to come from somewhere. 5. Networking is key for those, especially as they don't do interviews.
I second the above, call the school to confirm. The point you raised in your side note is an interesting fact pattern though. My sense is that if the OLSAS offer is accidental, an innocent or negligent misrepresentation in effect, Windsor wouldn't be forced to accept you, i.e.specific performance would not be on the cards.