On 9 May 2014, the group was checked in by two CSAs at Canberra Airport. They recorded the actual weight of each bag to speed up the check-in process and then attempted to convert the pre-checked baggage weight from 20 kg per bag to the actual weight, in the customer management (CM) module.
I believe this should read;
They recorded the standard weight of each bag
i.e. 20kg
UPDATE:
I referred this to the ATSB and they confirm that the original wording is correct. In case I'm not the only one to find this wording confusing, this is what happened.
Two days before the flight, the group was pre-checked into the departure control system with a standard baggage weight of 20kg per passenger.
When the group arrived at CBR Airport, the actual baggage weights were tallied, but outside the departure control system. This total actual weight was then used to update the standard weights previously stored in the DCS. All perfectly normal procedure.