Obstruction Ruling?

[TwoDot]

I have a question on a play that I observed while watching a game played between 15-16 year olds that my son coached last year. I have a different view of what should have happened than what was ruled and would like to know what the proper ruling should be.

Runners on 2nd and 3rd with one out. R3 is attempting steal and batter misses the bunt and then steps into the catcher as he was trying to put the tag on the runner. I don't think it was intentional, but it did affect the attempt. After some discussion of the two umpires the ruling was that R3 was called out, R2 was sent back to second base, (he had moved to 3rd after the steal attempt), and the batter remained at the plate to eventually hit a triple.

My feeling is that the runners should have been placed back at original bases, and the batter called out for the interferance. What would be the 'correct' call? I am assuming that OBR were being used.