[cardsfan2222]

That is a bug, and rule 305(d) posted above refers to a pitch at the beginning of an inning. The relevant rule is 305(b), which states: If the pitcher is replaced, the substitute pitcher shall pitch to the batter then at bat,or any substitute batter, until such batter is put out or reaches first base, or until the offensive team is put out, unless the substitute pitcher sustains injury or illness which, in the umpire-in-chief’s judgment, incapacitates him for further play as a pitcher.

You should be able to pinch hit, otherwise a team with a lead in the 9th could intentionally be thrown out to force a reliever to bat.