Have a look at this post you will find your answer I think
https://forum.onefinitycnc.com/t/help-my-toolpath-says-under-or-over-a-faq-on-why/1982
Have a look at this post you will find your answer I think
https://forum.onefinitycnc.com/t/help-my-toolpath-says-under-or-over-a-faq-on-why/1982