I hope they can/will fix this with a phone call. I just counted up the cancellations /new flights that I had on the trip - nine in total. It would be a nightmare trying to put it all in writing. The original booking gave me 560SC, (I have this itinerary) the second change gave me 640SC, (I have this itinerary also), and I ended up with 520SC. There were numerous other changes in-between that equalled one of the totals only different flight numbers. Most of the changes didn't even result in a new itinerary being issued, just a message through the Qantas app, (all history now gone).
Do I have to claim the ORC (Original Routing Credit), ie 560SC, or could I claim the higher 640SC that would have been allocated on the second change? The change that did the SC damage was the last one, as it changed the return rout rather than just flight times/numbers.