[Camron Rust]

The rules state that it is a violation only if A was the last to touch the ball BEFORE it obtained backcourt status. In your play, A1 gave the ball backcourt status but B1 was the last to touch it prior to that point. Therefore, it can't be a violation. Causing the ball to have backcourt status is not a violation....only being the last to touch BEFORE and the first to touch AFTER. A1's touch, being the event that gives the ball backcourt status just can not occur before itself.

However, there was a play published 2-3 years ago (situation 11 IIRC) that said it was a violation.

I choose to follow the rule.