We really need a sticky of things to ask the broker:
Will the buyers have to bring money to the table (e.g. do they owe more for the mtge/fees than your offer will cover)?
Is it being sold due to divorce or probate?
Are they international sellers?
Do the current owners have any trips using those points scheduled?
Sorry it didn't work out, my first contract had divorcing sellers, but the broker told me that when I made the offer, so I took the risk the deal would fall apart because the price was pretty good. Hopefully you'll find a better contract and have smooth sailing next try.