There are problem with fuel filled and tyres changed at pit stop display at race results section, experienced by me for second time.
By calculating fuel consumption I get unreal value, like there would be one more lap, but in place of lap-before-pit is showed one after pit stop.
I think its because Your team has garage before start/finish line. Your fuel after lap14 is 5.5 l, then Your driver makes 15th lap and are pitting with fuel ~1.8l and takes fuel before lap15 finish line. And then with full tank (exiting pits) ends 15 lap.
This is to do with the position of your pit box in relation to the start finish line. Your pit box appears to be just before & so as you cross the line you have all the fuel & new tyres