...mmm
Strange... if I remember Contest Rules, final standings base upon the number of problems solved by each team. How did your team take 2nd position? Would you mind contacting the judges? :)
By the way, I partecipated three times to regional contest. I've really had a good time. I suggest this experience to every student :)
The way it was explained in the Imprint (UW newspaper) is that points get deducted every time an incorrect solution is submitted. So, UW's team submitted wrong answers (several times, if I remember) and lost enough points to fall be St. Petersburg.