Wow, I did not think this would be controversial.
1 cm? What device are you on? Can you post a screen? Here is a Discard/Recharge screenshot of the iPad 4/Retina, playing a game "purchased" [free game--micro transactions] through the official App Store.
There is an entire screen available and those two buttons are--like I said--about 5 pixels apart from each other.
I don't see any reason those buttons could not be separated.*
http://imgur.com/a/GwBLa Now, here is a screenshot of the Armor. Notice the separation, even though that's a much smaller available space.
http://imgur.com/a/9Vl12 * And someone else mentioned the hit boxes, at the very least move the hitboxes farther apart if you don't want to mess with the cosmetics.