radio button ignores initial 'checked' value, and does not have initial 'checked' value match appearance

[kylebakerio]

even in the examples provided, you'll see the radio starts looking unselected, but when clicked the first time, lands in the 'unselected' position again. It is only after selecting twice that you get to see it in the 'selected' position. Worse, you also cannot set the initial 'checked' position.