So I’m written this in hope to help anyone who will have the same problem as I did=]
The way that I eventually dealt with the ”silly bug” was going back to my file before we applied the multires, I moved my verts as much as I needed to their desired places.
Reapplied the step of the multires and yes that meant that I had to do all the stamp process again (but to be honest it didn’t took too long:) and it was worth it ) eventually all the changes that Kent made in edit mode I did in sculpt mode with the wireframe on and multires off — got the same result as his without Silly bug =]