I would tend to say that at the sixth grade level we take a lot of liberties with the rules on a lot of things. With this in mind, even though not supported by rule, I don't believe that it would be unthinkable to have a do-over in this situation, giving the ball to the correct team and taking the points off the board. There is a REAL good chance that at this level,(and often at higher levels) neither coach will know exactly what the rules say about the situation, so going forward without hesitation, one can usually sell a common sense type call of this nature without a problem.