Trying out the 3rd person action template

I was playing around and checking out the new templates, and I wanted to put the combo button and charge attack button to the same gamepad face button like it many games. When I do so, the charge attack overrides the combo attack, and I tried to play around with the button setting but how should I go about doing this so it would work properly, when i press the button it does the combo attack but when I hold it changes to charge attack. I tried changing the button in the IA charge attack to hold but it just loops the charge hold. What would be the best way to go about this to get it to work properly?