Ok, I do see what you are talking about. Blazers advanced to the final play in game without losing. Delco lost one, then advanced to the play in game. Delco then beat the Blazers to advance to play Genesis.
I'm guessing it has always been done that way, not sure. It seems like the playoff the first weekend is sort of to determine the 2nd and 3rd place teams in Districts. So Blazers advance as the #2 team and Delco is #3. They then play one final game to determine who plays in the District final. The Blazers did benefit from only having to play 2 games that weekend where as Delco played 3.
Looks like 14AA and 18AA had the same format. The schedule is there ahead of time so its not like the DVHL is changing the rules as they go along.