I think I can help with the lines. I think that is the border between the collar group and the chest group. You must apply the morph equally to both parts, or you will get that breakup where they join. The easiest way is to stay far away from the dials for the individual parts, and adjust the breasts from the Full Body Morph dials instead. Make sure you have "body" selected, and use those dials, which control morphs for more than one group at a time. I hope that helps. pam