What is the purpose of the "u-shaped" piece of tape that is place twice under the nose? Is it possible to over-lift the tip with the tape? I've noticed an indentation, around the supratip, right where the last piece of horizontal tape sits. Does taping cause a line on the supratip to develop permanently and is it possible for me to change the shape of my nose with poor taping? I'm doing my best but it's hard to judge as a patient and not as a medical expert.