Your text to the EP's ear...

My fingers are like iron pistons from all the key spamming I've had to do just to get that one power I want to activate.
The issue may lie in the activation times overlapping when one strikes keys to fast. I have noticed that if I strike key A then quickly move to key B without giving time for key As power fully to activate then activate key B power will put key A back into being unpunched and I have to go back and hit it again.