How are the League Ladder positions chosen. I assumed it would just be on goal difference if points are equal. But this doesn't seem to be the case, see the aussie table below...

Team Points MP W D L GS GA
1 au Collinwood Magpies 18 6 6 0 0 22 10
2 au Melbourne Victory 1 18 8 6 0 2 21 8
3 au Lacy Windgivers 12 7 4 0 3 7 6

It's the same as in the league. First points, then number of matches played, then goal difference, then number of goals scored.

Thanks Vincent, that clears it up.