In the episode "The Truth Will Out," Charley Jr. is introduced as a girl. However, when Kirsten and Charley Jr. call to wish Rose a happy Mother's Day in the "Mother's Day" episode, Charley Jr. is a boy. And I quote, "It's Charley, Jr. He says it's cold in Minnesota."

Editor's note: This is an inconsitency between episodes, and thus not a slip-up. However, with it being such a huge difference, I will allow it to be posted.