judging by your results it seems that it must be predetermined. I grew mostly on top and the inner sides (cleavage), whereas it seems you are growing the outter sides. I am envious! that is exactly where I want to grow but don't! I did notice the tops seemed to grow the most for me when I was wearing at night. I think it may have to do with the fact that in a sportsbra and lying down, my boobs migrate up and together. So it would make sense this is how they grow. So if you want to grow the tops, you might try using a push-up bra or somehow place them in that position when you are wearing the magnets and see if that helps you to grow more on top.