It also requires more than the results of an online quiz to determine your political philosophy. A libertarian wants free borders (illegal immigration loses far less jobs for Americans than outsourcing), less laws (none of this banning gambling by tucking stuff into appropriations bullshit, no more hugely expensive/largely worthless War on Drugs), and lower taxes for ALL Americans (which will never happen if we continue to waste money with such follies as the Iraq War & the Great Wall in Texas).
So, your quiz results tell you that you are a libertarian...yet you support the invasion of countries, huge expenditures, a wall around the border for more cash spent, and wiretapping (infringing on the rights of Americans is not a popular idea amongst libertarians). Forcing another country to adopt the political philosophy of another is extremely authoritarian, your quiz results notwithstanding.
At this point, the only area where the GOP compares to libertarians (the real conservatives) is on gun control. After going farther with the drug war than any other administration, adding laws like the gambling ban, starting wars, etc...todays Republican Party has no claim to the conservatism of Barry Goldwater.