FWIW, I think the political compass is crap as well, for a start because it is entirely possible for two people with very similar "co-ordinates" to have very little in common politically at all. The test is biased towards the bottom left, it is far too easy to predict which direction a certain answer will effect your score, some of the statements are just bizarre ("When you have a problem, it is best to think of other things" WTF does that have to do with the axes given?)
Also, politics just doesn't work on "scales", as if you can say "I'm 33.2% more left wing than you" or some shite. It gives a very broad, very rough idea of what somebody's general attitude might be to certain issues, but tells you nothing specific, which is what matters, ultimately.