i added the train again and it seems that it was my misstake by putting too sharp angle at the train station bypass

Hmm, blocking other trains is a bit of a problem. A quick fix you can do yourself is to load this train up in the asset editor, change the trailer count down to 7 and save it as a new asset. Make sure to disable this workshop asset afterwards if you do so, otherwise both the original and the shorter one will spawn.

realy love to watch this train .. but it caused a lot of trouble for me because its a bit longer then the vanilla train (trains blocking each other at the exit of cargo station)
would be nice if you had a version with one wagon less

Very nicely done :3