The Yankees didnt score 6. The score was 4-0.
The Yankees DID score 6 runs. However, when a game is treated as final before it ends, then they revert to the last full inning of play. In this case, the Yankees scored 2 runs Top 7 but they never got through Bottom 7 so they went back to end of 6 and the score was 4-0.
As a point of reference, RL, Alt RL, and team totals typically require 8.5 innings of the game to be played. Some books might not require this but any book I've used has the 8.5 inning requirement.
Wow, that was my biggest play of season so far too. I capped the shit out of that one. I argued tooth and nail and the supervisor said that their rule for team totals have to go the full 9 innings. ridiculous.