It seems to switch the users around when I click on a rank over 15.

I clicked on the #15 slot:
http://img232.imageshack.us/my.php?image=scorebug1ay8.gif

It expands Renee's score, bumps it down to the #16 slot and then puts Lynne from no where on the list in the #15 slot.
http://img68.imageshack.us/my.php?image=scorebug2fg2.gif

Clicking on the #15 slot again closes the #16 slot and expands the #15 slot:
http://img148.imageshack.us/my.php?image=scorebug3rq3.gif

Clicking on the #15 slot one more time closes it and it goes back to the normal rankings.

Interesting, thanks.