That's ridiculous. You're insisting on using muddled meanings for words that have more precise and useful definitions. libertarians don't believe the Libertarians anymore than conservatives believe the Republicans.
Most Conservatives vote Republican and most libertarians would like to vote Libertarian. The fact that you're turning into a grade school teacher complaining about semantics in this conversaion proves that your points already gave up their ground long ago. Libertarians are Liberatarians, Conservatives are Conservatives, it doesn't matter how you spell it.