I've already proven you wrong, yet you persist.
Two teams are tied and play each other. After the game, either team A will be up one game or down one game. This is fact, and that's a 2 game "swing."
Yes, team A or B will only be one game ahead or behind, so in that sense, it's just one game, but the differential between team A or team B winning makes for aa 2 game swing. Why is that so hard for you to grasp?
I get your point. Team A wins, team B goes from tied to -1. That's one game, but the only other alternative was Team B wins and is up 1 games. The differential is 2 games, not one, between the two opposing results.
Simple math.