I haven't had much luck either but I believe the rules are different for boys and girls hockey. BSM won the A title a while back and is now playing in the AA bracket.
The main idea with the two-tier system was to give more teams the opportunity to play in the state tournament, particularly the small schools. Instead, you've seen teams sandbag and stay in the A level when you could really make the argument that they should be playing AA. Like I mentioned with the girls, the biggest manipulation I have seen was SSP winning AA and then announcing a switch back to A for the following season (which they promptly won).