Birth Cert Blues

My birth certificate came back from PA today - with a letter saying I need to resubmit it with proper payment. No, I didn't forget payment, I wrote a check for the wrong amount. Their website says certification of documents is $15 "per signature". There are 2 signatures on the document, so I paid $30. Apparently it's $15 per document, regardless of the number of signatures. Feeling just a little silly right now! :)