No, you've got it right. A lot of people trying to be cute and make southern language seem more alien than it is are over-"correcting."
When southern people say y'all to one person, they're really addressing you and your family (even though you might be the only one there.) If I ask "how y'all doing?" I want to know how you and yours are doing.
When southern people say y'all to one person, they're really addressing you and your family (even though you might be the only one there.) If I ask "how y'all doing?" I want to know how you and yours are doing.