Ok, I just get the mod installed. But it is really complicated to understand o.O
Btw: I found
this Lets Play-Videos and here he do not have this bug o.O
Seems, that the bug is just, when you save on patrol and quit.
He takes the missions several times, and it seems that it works, while he is often off patrol.
*edit* For a silent hunter beginner - like me - it is very hard to understand how to install and use mods.
I don't wanted to install mods, until I know the strengths and weaknesses of the game.
Maybe it is bugged as hell, but I accept it in the beginning playing silent hunter.
If I know the game nearly complete I can go on to install mods and take a look what is a good mod for me.