So just out of curiosity... I was going to be 10 SC short of Gold, so I cancelled a return trip from ADL - SYD and changed it to ADL - MEL. Under the double status, I would get 40 SC now instead of 30 SC. But for one reason or another, when I rebooked, I was not charged a fee online and I have the same booking reference number as the previous flight.
Does this mean that I still will not get the double SC for that flight and I just wasted that altogether?
EDIT: The SYD flight was booked before the offer came out, whereas the rebooking was once I had qualified for the offer.