I'm not sure I agree with the definitions of libertarianism and authoritarianism on which the test seems to operate. "Authoritarianism" appears here to refer to one's general attitude to life, rather than one's political views.
In theory, I could be a libertarian yet promote a very authoritarian parenting style. I might say that only the parents / legal guardians may infringe on the rights of their children, and nobody else (ie the State) may restrict their freedoms. My parenting might involve hitting my children and constantly invading their privacy, yet at the same time if somebody tried to force them to go to school I would be mighty pissed off. Then when the child becomes an adult I would acknowledge that they own themselves and cease aggression against them. Similarly, if I were an employer I could treat my employees like mindless sheep yet still consider myself a political individualist.
The poll also seems to consider racism a form of authoritarianism. If I think my race is superior to others why does that mean I can't believe in strong individual freedom?
Basically a lot of the questions are kinda irrelevant to politics and you need to be a douchebag to score high on the authoritarian scale