Wrong basket

[Vinski]

Team A’s ball to start second half. Player A1 throws-in to A2 in A’s back court. A2 thinks she is still shooting at the same basket they had during the first half and dribbles up to B’s basket, stops the dribble, then shoots. The ball hits the backboard, then bobbles off the rim and misses. A2 then catches her own rebound.
I blow the whistle with a double dribble. My partner comes running over blowing his whistle like crazy and over rules me saying that the ball should not have been blown dead and that my whistle should be ruled inadvertent with a throwing for team A.

Question 1: Did I totally muff this up and is my partner correct. There are a couple of scenarios in the case book that are very close to this. And from what I can tell, if a player throws the ball at the opponent’s backboard, it is considered a dribble.

Question 2: If the ball would have went through the hoop in this situation, would it have been 2 points for the other team and then an unrestricted throw-in for Team A at the end-line.