I am busy compiling a simple activity on the Garden route of South-Africa. The player train starts at Knysna to George and I have three AI trains coming from George to Knysna. Two of them behave like I want them to. Theye start at their given times and the proceed towards their end piont. The third one just show up and wait for the the player train to enter the station and then will start to move. There are 6 stations between them where it can pass. It does not matter if I make passing paths and I did make sure that AI and player trains do not share a platform. I do have the tutorial for Activity Guide by Arnie Lee. This is a very good program, but even it can't sort this out for me.

Any suggestions would be welcome
Thanks