I am trying to rough off a tab and it keep adding in an extra pass or two in the y axis that it doesn't need to remove the stock. When I simulate it all the material is removed on the second y pass but it add a third pass at most depths and a 4th on other. It is a 1" cutter and the tab is less than 1" and I have my step over at 70%. My stock is from a model and I am using rest machining from WIP. I have changed every setting I can think of to no avail. Am I missing something obvious?