I notice you have box and boox below, maybe that's your problem.
What you're really saying is, "you're either in VA or WASHINGTON" and that's fine, but if I use radios, I always have a default checked value; otherwise nothing gets passed. in other words, use radio buttons in cases where they MUST make a choice, where no answer would not make sense.
Unlike text fields which will pass the variable name but blank for the value, radios don't pass either the value OR the name when no option is checked.
HTH.