When sketching lines, I often get unwanted stub lines in my sketch. For example, let's say I sketch a simple rectangle. When the four lines of the rectangle are complete and I go to extrude the rectangle it fails. I will go check out the sketch only to find a small stub line that I inadvertantly had placed in the sketch. This happens quite frequently with both me and my co-workers. Is there a setting within SW that I can change to help reduce this?