Like Guido I have started making a differentiation between the measured distance and course name on the map.
I allow the RD to tell me what they want on the map for the race name and I add a block below the title "Measured Distance".
This weekend a club wanted a 50k measured and they laid out a 10k loop which they would run 5-times. They said they didn't want any out & back sections. We all know it's almost impossible to measure a loop without an out & back section and have the start/finish in the exact same spot so I told them, "I'll measure it but it's not going to be exactly a 10k loop" and it wasn't.
The course map title says GoRUn 50k, but I added the distance of the course (50.24k) to the map.
It doesn't bother me they don't call it a 50.24k.
-b