This looks like still the old bug of 1.59. It was a blind fix, so it's indeed possible that it only appeared to be fixed and the bug is still there. Can you send the log to Support? It seems that they have to look into it again.
Well, I sent the file and I received a communication telling me that the double trade were only visual and not real trade, and this is what I stated opening the incident. I did not received any other communication and non bug fixing was posted on zorro's web site.