Hello Mike,
Real interesting question. I understand what RRoP is saying but, it still leaves a lot of unanswered questions. I understand that the bet should be corrected but, does a player have the option to fold? if so, must he surrender his lesser amount? All that rule states is; no one who has acted may change a call to a raise.
I'm sure many would agree that the amount of the bet we face has a lot to do with whether we want to call or not. To double the required amount (especially after confirmation from the dealer), somehow should allow the bettor to retract his short bet.
Great question that should attract some debatable circumstances.