I wouldn't say "relatively almost completely opposite"; I'd say one is more neutral than the other, but hardly relatively almost completely opposite.
On another note I think I should take the quiz again.
edit, this time:
Economic Left/Right: -1.50
Social Libertarian/Authoritarian: 0.82
Did a flip-flop over the centre of the graph. I'm not going to change it though, I don't really like the structure of the quiz because I could answer most of the questions a little differently every time.