I'd also expect that the ranking is based on some kind of time window or has a decay factor. Maybe you had a really successful game/week move out of the window.
Somewhat related, my cup loss was brutal. Up two with 20 seconds to go, I get fouled and miss both free throws. With one second left, they score a layup to tie the game. I miss the nonsense shot at the buzzer. Overtime.
I get out to a 7-0 lead in OT. Still up by 4 with 30 seconds left. I've been running 4 guards with my best center fouled out since the 4th. They miss a 3, get the board, and immediately make a 3. Foul me and I make both for a three point lead with 20 seconds left. They immediately make another 3 to tie the game. My team holds for the last shot. With two seconds left, my worst player on the court tries a layup and gets blocked. Somehow, in those two seconds they go cross-court for a DUNK to win the game.
Before I retire from this game, I want to go through my history and tally up my overtime record and my buzzerbeater count. I got buzzerbeatered TWICE that game!