Some trains missing correct polyline

[IgoBoerrigter]

itinerary link:
http://10.42.2.12:9050/?module=planner&fromPlace=52.35840924385216%2C6.653165817260742&toPlace=52.178247724172174%2C4.995861053466797&time=9%3A43am&date=10-28-2015&mode=TRANSIT%2CWALK&maxWalkDistance=750&arriveBy=false&wheelchair=false&locale=en&itinIndex=2

see link for poly line:
https://developers.google.com/maps/documentation/utilities/polylineutility
fill in encoded poly line:
qaqHewrg@{WpeKbtH|bMvmDpiRxqEvjg@ko@rvIjzBfnJkCrmQbe@`hF