The trades.csv and the ...real.log were also wrong.
Example long trade: buy 1.25304 sell: 1.25288 (175.000 units)
Broker shows: -25,75 EUR Zorro: +42.66 EUR

I saw another error which I decribed above with a short trade.
It seems the error does not occur always. Today a losing Long trade was shown correctly. I will have a further look in the next days and give a statement, when I have updates:

Thanks for your response.