I’m not sure we *know* the tank 11 txfr pumps were on.
The 5/7 inlet valves were in the override position.
Even if the T11 txfr pumps were off, the de-air pump would pump fuel to the trim txfr pipes and hence to 5/7.
All assuming I remember the report correctly.
The nub being, if you ‘hide’ fuel and forget to return the 5/7 inlet valves to normal, you will still feed 5/7 even if the 11 pumps are off.