Bug DTM 2015 fuel use bug

But in DTM Experience there still is an automatic multiplier and it works like this (iirc):
10 minute race: fuel usage multiplier = 4x
30 minute race: fuel usage multiplier = 2x
60 minute race: fuel usage multiplier = 1x

 

But in my screenshots the races were both 30 mins, so why the difference?

 

Raceroom Experience = no automatically adjusted multiplier, multiplier is always set to 1.
DTM Experience = automatically adjusted multiplier, depending on the race length you chose.

DTM Experience:
10 minute race: fuel consumption multiplier = 4x
30 minute race: fuel consumption multiplier = 2x
60 minute race: fuel consumption multiplier = 1x

Raceroom Experience:
10 minute race: fuel consumption multiplier = 1x
30 minute race: fuel consumption multiplier = 1x
60 minute race: fuel consumption multiplier = 1x

So in a 30 minute race in DTM Experience the fuel consumption is twice as high as it is in RR Experience.

 

Finally I understand.
Thank you.