Maybe it would help (but I doubt it)
if we just looked at the "IHSA rule" (sic) the umpire was referencing.
FED 6.2.4J: With R1 on first base and two outs, F1 attempts to pick off R1. AS F1 pivots to throw, he realizes that F3 is not on the base, but is in his normal defensive position. F1 completes the throw without interruption. The coach of the defensive team want a balk called on F1. RULING: As long as F3 is in the proximity of the base, F1 would not be guilty of a balk. Proximity is umpire judgment and is based on whether the fielder is close enough to the base to legitimately make a play on the runner.