Why don some of the stats on Statistics tab (Fill-Ups box) match the math on the Browse tab?
The total values you see on Browse tab are simply the sum of the corresponding values from displayed records. But the numbers on Statistics tab do not include the fill-ups marked as Missed FillUps (and might not include the first ever fill-up; configurable from Settings). The fill-up volume of those [excluded] records affects their previous records (indicating how much gas has been burnt since previous fill-up) which are obviously not present. So they are entirely removed from the statistics.