I think the test is faulty.
I checked out their FAQ's because I was about to write to them for the same reason. According to the writers it is supposed to be slanted-- that it was written in a way that makes both liberals and conservatives say,
"hey, this test is biased!"
They go on to say that they aren't asking yes or no questions, but rather, are giving propositions. You either agree or don't.
Personally, I didn't like how the propositions were framed because many of them forced you to answer in very simplistic terms when occasionally it was anything but simplistic.
As for my score, I got pretty much a bullseye, which I almost always get on that test. My score is nearly dead center with a slight deviation towards the libertarian right.
"God creates out of nothing. Wonderful you say. Yes, to be sure, but he does what is still more wonderful: he makes saints out of sinners." -Sren Kierkegaard