1: Provide us a proof that the flow-meter You mention was in fact used.
For the subtype -130 = type for hot water - the increment is 1 Tick for 100l = 10 ticks for 1m3!
Anyways, the pulses are every 100 L (standard unit). If the pulses were used, recorded, whatever, does not seem to be the case, or at least there is no indication of this.
If they only manually read the dial, they would have to go by the odometer-like numbers, in 1000 L increments.
Edit: There are supposedly millions of data points. This suggests electronic data recording of some sort. Maybe we will see some of that one day.
I hope it makes more sense that what we have been getting so far.