case book questions

[MattRef]

I have a couple of questions about a couple of cases in the case book, so get your copy out and help me out.

My first question concerns 3.2.2F on page 15. Allow me to quote the text:

"Team A takes a time-out following about two minutes of pla in the first quarter. the scorer signals the referee to the table for a discussion. The scorer indicates that although team A No. 32 was a designated starter, No. 34 stated instead and is still i the game."

According to the book, there is no penalty for changing a starter after play has begun, quoting 10.1.2a and 3.2.2a. But in neither of these rules does it differentiate between when play has started or not. In act, in a previous case (3.2.2C), they still penalize for adding a player to the score book after he has played for an undetermined length of time. Can someone explain this apparent discrepancy? I am a bit confused.

My second question deals with case 4.15.4C(c). here is the text:

"After dribbling and coming to a stop, A1 throws the ball: (c) against his/her own backboard, catches the rebound and dribbles again."

In (a) and (b), A1 throws the ball against the official or against the opponent's backboard, both constituting a double dribble. But in (c), it isn't a double dribble. Someone please explain the difference in dribbling it against your own backboard vs. against the opponent's backboard? In the ruling, they state; "in (c), the action is legal as a player's own backboard is treated the same as touching the floor inbounds, but does not constitute a part of a dribble."
If I understand it correctly, if it is treated as a part of the floor inbounds, it should be a double dribble because A1's initial dribble had ended, and he attempted to resume it. please help me. Thanks!
Matt