Yes, I know, the political compass is bullshit. Please don't comment just to say that.
It looks to me like you have to believe in some pretty fucked up shit to end up on the top half of the grid, like restricting people's sex lives, imposing religion, and persecuting minorities. Even though I've become strongly ML over the past year and a half or so, I still end up libleft.
Just took it and got libleft (I'm ML). Tried it again, picking all the most awful "authoritarian" options, and only just edged into authleft, so I don't even know what you would have to pick to get properly top left.