Hiring workers

When you hire workers to plow and Cedarfield, do they do it in a really weird way instead of going back-and-forth long ways? Mine is doing it in a really weird way and I’m not sure what I’m doing wrong. In the third image, you can see that there’s a bunch of areas where he hasn’t done even though it’s within the field so he’s doing it in a really weird pattern and I just don’t know what I’m doing wrong. Any help would be super helpful thanks in advance