I know that sandwich formations exist, but they are rare. Thats why I am asking, maybe some Dev can aswer me that, how about TrainSim-Matt ? Edit: I might need to look at something when I finished this run, I might have a suspicion.
Yes that's a bug. We've been looking into it today and found the cause. I think Matt's updating the timetable for an update so I'll speak to him about what needs doing.
I got the same thing but with a 146.2 at each end (playing the Dresden 'journey', one of the early scenarios). As stated, such formations are rare IRL (at least, in the parts of Germany I've frequented), presumably the result of a failed driving trailer. While we're on minor gripes about Dresden (an excellent new route IMHO), the journey starts with 'training' on a cab car, but followed by a journey using a loco (146.2) cab, and then training on how to drive the loco, which seems a bit arsey-versey.
I also noticed that the cab car always gets replaced by a loco in journey mode, when will it get patched?