From the help screen: "This setting dictates the earliest inning of a game you would bring your infield in in appropriate situations."
I'm going to say that "appropriate situations" is the operative term. I'm guessing "infield in" doesn't mean the infield is in 100% of the time whenever a runner is on third. Maybe, the infield is in 83% of the time in the situation presented. Who knows?
Had the infield been in then Gwynn's groundball to first base in the bottom of the fifth would not have resulted in a run scored when the super advanced table 3 infield in chart is reviewed (scroll about halfway down to find the infield in chart)
https://www.baseballthinkfactory.org/bt ... mrules.htm