Batter "Walks" on Ball 3

[HugoTafurst]

A friend called and related this situation.

R1(3rd), R2(2nd) 2 outs. Ball 2/Strike 2 count.
Next pitch is a passed ball, Batter thinking it is Ball 4, takes off for 1st.
As R1 scores and R2 is heading to 3rd, Batter continues past 1st and heads for 2nd.
F2 throws to second to get batter, R2 comes home to score.

This happened in a USSSA 10U game. Umpires discussed the situation and ended up sending R2 back to 3rd and of course batter back to bat with a 3-2 count.

I know if it was you or me, this never would have happened - we would have been loudly announcing the count and Batter would never had made it to first....

But it did happen.