wrong task distance race: finish circle

https://www.soaringspot.com/en_gb/international-bailleau-2017/results/speed-race/task-4-on-2017-08-04/daily

soaringspot: 181.06
pysoar: 184.06

this is probably due to the finish circle.

questions:
- no reduce_distance in task?
- allways the case with finish circle?