I'm in agreement with JR and Barry. There is no way that the 2nd basket by B should be allowed to count because the ball was never at the disopsal of A2 out of bounds. I would think the best way to think about this situation is to think about when you would start your 5 sec count. Personally I start it when A would have posession and be standing OOB. It makes no sense to me to start this count when A1 grabs the ball at the free throw line because he can't inbound the ball from that position.

Just some of my thoughts on this, and i would definetly blow it dead, wave off the 2nd basket and redo the inbounds with A being allowed to run the base line.

Jerry