I will leave this bug open until I figure out what is the cause.
The artifact with "wings"(photo 1 in red) I am unsure what causes this.
(photo 2 and 3), this is artifact of the method. Binding on the actual model can be alleviated by sculpting the master model as in this tutorial. https://github.com/patmo141/odc_public/wiki/Repairing-Defects-in-a-Model. Alternatively, you can sculpt the guide after it has been created, use care to mask the important parts so as not to distort functional parts of the guide.
Hi Patrick. Sometimes it happens and I have to do several attempts to get a good result. I can't understand my mistake. Thanks!