I just completed the 10 lap night race (last) on Endurance Kings with the Agent for double points, won, and gained 56k odd fame points, but the slider for the level up hardly moved - I would say it went about 1/6th of the maximum. Glitch, or cynical FM trick to make it harder to get the more generous level up bonuses?

I have been "clean" since 2.4, leaving the Delorean in the garage as I have been getting 40+ GC a day for completeing one of the two Le Mans 10 lap races, and possibly one shorter race from another series. If goal posts have been moved then I am firing up the Delorean as a matter of principle!