I'm still with you, but are you saying this erroneous fuel indicated in the supply tanks would have to indicate more than the 48kgs for the Red warnings and more than the amount required for the amber cautions? I do think that's far too much for it to be anywhere near the flight time/fuel used calculation.
On the subject of Re-starting in flight, the evidence shows both the engine main switches being in the guarded flight position, indicating normal two engined flight, the Shed BUS was still in the guarded normal position indicating normal two engined flight. The warning system and Fadec log as investigated by the AAIB gave no signs of either engine having been re-lit once stopped. As Sid said a while ago, it will be interesting to find out if the throttles were out of the neutral gates?