It is the opposite for baseball. Softball games are shorter so they play both elimination games tomorrow, so the team that wins at 4 will immediately play again against the loser from the 1-0 game. That way they don’t have to potentially play a game 7 on Monday like in baseball, they just play it as a doubleheader Sunday if necessary.
That's what I was thinking. In the baseball regional's the first elimination game (in this case it would be UK-Upstate) is played first the next morning.