Hi, when I have forgotten to write down the mileage on a refuel, I would expect the next refuel to use the total mileage and litres for the two refuels to calculate the mpg. However it is just using the values from the refuel where I recorded mileage.
I think it is because if I leave the mileage field empty it automatically fills it in with the previous value.
Example:
Date: 28Dec2019
ODO: 17002 miles
Fuel: 43.72 litres
Mpg: 39.62
Date: 02Jan2020
ODO: unknown (auto fills with 17002)
Fuel: 50.78 litres
Mpg: blank
Date: 16Jan2020
ODO: 17806 miles
Fuel: 41.14 litres
Mpg: 88.84 mpg (would expect ~33mpg)