Player Control Foul/Throw-In Violation

[Blue37]

Two questions from a fan:

A1 has the ball and is guarded man-to-man by B1. A2 sets a legal screen and B1 fouls A2 as he attempts to get through the screen. It is B's 8th team foul. Does A2 shoot a one-and-one? The official said no, because it was a player control foul. Hypothetically reversing the foul - If A2's screen is not legal and he commits the foul, Does B1 shoot a one-and-one if it is A's 8th team foul?

A has the ball on the baseline for a throw-in. As the thrower starts the throw-in, he realizes the defense will intercept the pass, so he holds onto the ball. Him momentum carries him forward and he steps on (not over) the line. Is this a violation? The official said yes.

Thanks!