Some Libertarians are pro choice. Ron Paul is pro life.
Libertarians, as I understand it, would might want state laws to be removed, of Federal Laws legalizing certain things, removing state laws. Ron Paul just wants to remove the Federal Laws.
Well, that clears it up.
I think when it comes to economic matters Paul is on target because the free market, the only real creator of wealth, demands...well, freedom - from government interference (a problem from the get-go because the government is Constitutionally assigned the job of printing money).
We all know Paul gets in the most trouble in foreign policy where his isolationist/Libertarianism really gets convoluted, IMO.