Filtered total distance tracked for a model year incorrect

[marvin]

I have a setting of litres per 100km.
When I browse for Subaru Outback and filter for engine type diesel, the total tracked km for each year group is wrong. I believe it may be showing total miles but reads km. See 2009 there is one car matching diesel engine type. It has done 173000km approx. The total for 2009 Subaru outback diesel however reads 107000km approx.