Are you leaving on time and waiting for the timer to finish? If you leave early, you will receive a Red Cross.
@ londonmidland: Yes, of course. Stopping at the right place (+- 5 yards) at the right time. Waiting for the message "open doors", open the doors, stand up, take a look at the platform. When the circle is closed an green and I see the mesage "close doors", then I press the Tab key and close the doors.
I can close the doors once the green circle is full and leave early. That doesnt incur a penalty. Just some useful info. As regards the issue, never seen that before! If an early or the first stop is missed does it screw up the rest? Struggling to think of why your issue is there.. anyone else got any ideas?