Hi!
I have the same problem, I don't touch the knob, my fingers are to a centimeter of distance from the knob and it is active. I went to the shop to try others Beatsteps Pro and they had the some reaction. So I have always thought that it was normal. When I am at home I am very careful that nothing is to the distance of a centimeter from a knob, a cable that casually passes near to the BSP can create some big problems.
But during a live performance I have been in an embarrassing situation because of this problem. How can I change the sensibility of the knobs?
Ciao!!