1st base occupied - 1 out - dropped 3rd strike - batter/runner interference

[Guest Ihsabok]

12yo baseball...  One out, with a runner on 1st base. Batter swings at strike 3 and ball is dropped by the catcher. The offensive coach yells at the kid to "run!" The batter begins to run to 1st and the catcher (a bit confused) throws to 1st base, but just before reaching, the ball strikes the batter-runner in the helmet, and the ball is deflected into right field. The 1st base runner, advances and scores. The batter-runner was out on strike 3. The question is what happens AFTER the batter-runner is struck.  I've spoken (afterwards) to 3 different umpires with 3 different interpretations.

Umpire 1: Despite the coach yelling at their batter-runner to run, the cacher should not have thrown. Ball is live. The 1B runner scores, the batter-runner was out on strike 3.
Umpire 2: As soon as the ball struck the batter-runner, the ball is dead since the retired-batter runner is out of the batter's box. 1B runner returns to 1B (or it was debated... maybe awarded 2B...)
Umpire 3: Since the batter-runner is out of the batter's box, and in the throwing lane (to which the catcher could be attempting a back-pick to the 1B runner) the batter INTERFERED with the play being out of the box AND in the throwing lane. Because it would be the next closest runner to home plate, the 1B runner would ALSO be called out on interference for 2 outs on the play.

[Thunderheads]

1 minute ago, beerguy55 said:

In the specific example by @RBIbaseballthere isn't R1, only R2

well ... thats' MY FAULT then for not reading RBIbaseball's post well enough