Many libertarians are amazed to find out what is in the LP platform. It is all there.
You should never confuse Libertarians with the Libertarian Party....that's why we're Libertarians. Ask a Republican or Democrat whether they support EVERY official position their party takes, and they'll probably say no. Does that make them any less a philisophical member of their party?
Most Libertarians I know, (myself included) aren't registered members, and often we do not vote for Libertarians candidates, except if the only other choice is a known lefty.
As a side note: My father in-law is a registered democrat, has been all his life. To this day, he has never voted for a democrat except during a primary election, yet he still calls himself a democrat.
Lesson: Labels are not always accurate.