Sync Trouble - Arrival Times problem

[pschippers]

Syncing fails and when checking the flagged records it states that the arrival time has to be after a time that is usually about 4 hours after the departure time... even if it is only 1 km away. For instance an actual departure time of 2018-02-20 17:21:00 and actual arrival time of 2018-02-20 17:30:00 will have a sync error message stating Arrival time must be after 2018-02-20 21:21:00
Why are these being flagged as errors? and how do I resolve it so it is correct - what really happened, not what the program says it should be.