[ctblu40]

I just finished taking the NCAA preseason rules test online and I'm a little confused now. Here's the question:

QUESTION:
B5 bats in place of the proper batter B4 and grounds out to end the top of the sixth inning. The bottom of the sixth inning is then completed. While the home team is warming up and before the start of the top of the next inning, the home team coach appeals that B5 batted out of turn.

ANSWER:
A. The umpire should not uphold the appeal.
B. The umpire should uphold the appeal.

I answered "A" but was incorrect. Here's the rules link provided as an explaination:

Rule 7: Batting
Section 11-a: When Batter or Batter-Runner Is Out

A batter is out when:

On appeal by the opposing team, the individual fails to bat in the proper turn and another batter completes a time at bat in that place.

(2) If the improper batter becomes a base runner or is put out and an appeal is made to the umpire-in-chief before a pitch to the next batter of either team, or a play or attempted play, the proper batter is declared out and all runners return to bases held before action by the improper batter. However, any advances by a runner(s), (e.g., stolen base, balk, wild pitch, passed ball) while the improper batter is at bat are legal. If the proper batter is declared out, the next person in the lineup shall be the batter.

(3) If a proper appeal is not made, the improper batter becomes the proper batter and the results of the time at bat become official.

(4) When the action of the improper batter becomes official, the batting order resumes with the following batter.

A.R. The umpires, official scorer or public-address announcer shall not call attention to the improper batter. If this occurs, the umpire-in-chief shall warn the official scorer and/or the public-address announcer that on the next infraction the offending person will be removed from the position.

What am I missing here? Since the appeal wasn't made before the next pitch, play or attempted play, why should the umpire uphold the appeal?