Hi @valiux,
Which version of Carbide Create are you using ? I remember a bug was reported sometime ago that edits to various toolpath parameter (including feedrate, stepover) were not properly taken into account / reflected in the G-code. I’ll try to find that thread, I seem to remember that a workaround was to close and relaunch Carbide Create to be sure the parameters are taken into account.
EDIT: this is the problem I was referring to, but it was fixed since then (June 2020), I suspect your problem is different