slightly wrong task distance

[GliderGeek]

http://www.soaringspot.com/en_gb/jwgc2017/results/club/practice-1-on-2017-07-27/daily

notice that there are a lot of different tasks outputted in console

[GliderGeek]

reason for lots of output on different tasks is that somehow there are different dates in these tasks:

if temp_task_info != temp_new_task_info:
    print 'different task information present in igc files'

temp_task_info and temp_new_task_info both store a date property

this is however not the reason for the wrong task distance