Boxer training and growth

Does anyone know answer to this. Just for an example. If you train a boxers chin and it goes up 1 point. Do you lose a point in potential growth or not?
Also little thing that annoys me is if you go to growth and use a point it always go back to main screen. So if your going to use a few points on one boxer it’s a slight inconvenience finding the boxer, going to growth adding point then doing it again. It’s sumat of nowt but am lazy. Haha.