[SergioJ]

Can somebody explain the following:

NFHS Rule 8-4-3 ...A runner is entitled to advance without liability to be put out when:
g. a fair batted fly ball strikes the foul pole above the fence level or leaves the playing field in fair territy without touching the ground or going through the fence. It shall entitle the batter-runner to a home run.
h. a fair ball bounces over or rolls under or through a fence or any designated boundary of the playing field. Also, when it deflects off a defensive player and goes out of play in foul territory, deflects off a runner or umpire and goes out of play after having passed an infielder excluding the pitcher and provided no other fielder had a chance to make an out.

NFHS Case Book 8.4.3 SITUATION R: B1 hits a long fly ball to center field. F8 goes back to the fence and leaps in an attempt to make the catch. The fly ball goes past F8, deflects off (b) the top of the fence, strikes the fielder's glove and ricochets over the fence in fair territory; ... RULING: In (b), a ground-rule double is ruled. When the ball ricocheted off the fence and then off the fielder's glove, it was no longer in flight and caused the hit to be ruled a double.

Sounds kind of contradictory to me. Now, the case book also references 2-28 which states: A ball in flight is any batted, thrown or pitched ball that has not touched the ground, an object or a person other than a player.