Hi Jan,
this is a bug in the PncConf Wizard. I had the same problem the last days if I enter my values into the wizard the saved calculation was a mess. The reason is if you linux cnc installation has german language setting. The wizard can not work with the differenze between dot "." and comma ",".
I changed my language to english and the problem was gone.
I'm not sure where I can report this? I think this problem occurred many times if the user setup an german language.
Have fun
Ferdl