I'd be shocked that Ron Paul said he wasn't a libertarian. "Libertarian" wasn't really a term he used, at least not particularly often, but he was clearly advocating libertarian political views. Granted, not absolute 100% pure libertarianism (See his comment about defaming people during the SC "Legalize heroin speech"), and definitely coming from a constitutional state's rights perspective, but he clearly was a libertarian, or at least predominately so.
Ron Paul didn't generally play politics either so he would have never said this. Granted, he did, but not at the expense of principle.