Problem:
Train A was stopped by opening schedule window to allow new trains to enter circuit (from depot via tunnel entrance)
Train B however is running straight through A instead of waiting behind it.
http://simutrans-germany.com/files/upload/simscr17a.jpg (http://simutrans-germany.com/files/upload/simscr17a.jpg)
R2568 with Pak128-648
This sounds like the problem discussed in Multi Train Bug (http://forum.simutrans.com/index.php?topic=1703.0).
I think this is something different; even under this conditions the first vehicle shoud reserve a track.
moving this to incorporated as the thread opener did not respond, assuming it is fixed