Out-Of-Bounds Situation

[Dougster45]

Can someone explain NFHS Case Book 7.2.2 to me?

7.2.2 Situation: A throw-in by A1 (a) strikes B1 who is inbounds and rebounds in flight directly from B1 and then strikes A1 who is still out of bounds; (b) is batted by B1, who is inbounds and the ball is next touched by A1 who is still out of bounds. Ruling: A1 caused the ball to go out of bounds and it is awarded to Team B at that spot for a thorw-in for both (a) and (b).

I have always thought that the player that the ball last touched inbounds caused the ball to go out of bounds. Is this a typo? I'm just a rookie and could use the help.

bty-excellent forum!