And (does'nt matter in this case) hte fuel consumtion for a given task is in kilograms. If the SG is lower, there fuel consumption in liters will be higher. So, if calculated in kilograms theres no need to recalculate the fuel consumtion (in liters) depending on temperature.
Indeed, but what does matter is if someone, by mistake, adds 20% to the number in litres to get the kg instead of the other way round. The difference is very significant, and mistakes can happen. Not saying it did here, tho', no evidence that it did or didn't.