Live website needs upgrade from 6.3.2 to 6.3.3 without being down.
Provider needs to have the patch.
Upgrade should be done at night (eastern time) to not block sales as much as possible.
Possible shipping bug to fix if upgrade does not fix it.
It seems that when you add item to cart and then leave the checkout pager and comeback the default radio button is not visible and people can just continue checkout without paying shipping.