I've often had problems with hatch from release 18 which was my first TC. I find that the most common problem for me when using Pick Point Hatching is when there are inadvertently multiple lines in the area that I am trying to hatch. My work round is to drag out the area that I am trying to hatch outside of the rest of the drawing, hatch it then put it back where it was complete with hatch. I also often use the Path Hatch tool instead and then do a 2D subrtract fo any area within the hatch that I want clear of the pattern. I'm not sure what the difference is between the Pick Point Hatch tool and the Hatch tool though, maybe someone else can answer that one?