Thanks everyone for the advice. I think the root of the matter is the wording of the contract. I'm not sure how you can pay transfer/bond fees before they give the other purchaser notice. This contract makes absolutely no sense!
22.3 The Purchaser/s herein acknowledge and accept that the...
I'm in the process of signing a competing offer on a house that's already under an offer, which is subject to sale.
My offer would only be subject to bond (already pre-approved).
The tricky part is: in order for the seller to give the first buyer 72h notice, i'd have to register a bond and pay...