Subtraction vector points artifacts

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Hi there. I searched for a past question about this for awhile, and i couldn't find anything about this subject. Well, I'm building cartoon characters in Designer Pro 7 and when I create a vector object then subtract a vector line from the object I always get these leftover artifacts that are 4 vector points at the end of the subtraction areas. I'm using an "ellipse" linear line for the subtractions. I'm attaching a screen shot of what is happening. I apologize if this has been ask before. I just got back from a long hiatus.