Well why are you clicking the wrong button? It's because the radio's aren't visually distinctive enough, isn't it? Your eyes don't quite catch which one is which because they get lost in the clutter. Or is that just me? If that's the case, I think this would help, because the label sticks out.
Normally, you put radios each on their own row, so that the buttons don't stand out. Because they're lined up uniformly, you notice the label, because that's different. Same thing with putting the buttons in the middle with the labels on the sides. They'd stick out, because they're different.
elusion : http://matt.diephouse.com