Regarding the duplicate labels, back in 2009 I ordered a Gibson SJ-200. When it showed up, the serial number on the headstock didn't quite match the one on the label. I emailed Gibson and after sending them pictures of the guitar's headstock serial and label, they sent me a new label to stick on the inside. They told me sometimes that happens and to simply stick the new one over the old one and not to try and remove the old one.
So that's what I did. No longer own that guitar, just wanted to share