Thanks for your reaply.
No, I have only one pass (in tool I set max cut as 10, and in real I take only 1mm so it is ok).
My problem is why tool go into material under angle (slant)? why not upright?- that I need. Look again at red arrow in above image
I see something else, if I use only offset then toll go upright, but if i add poket then each entrance into material I have with slant