Illegal pitch hit twice...

[DeRef]

Had something happen during a recent tournament (luckily not on my game) that I can not find a rule to cover. ASA SP rules.

Pitch is thrown and called illegal but batter swings and bounces the ball back to the pitcher. However, the batter remains stationary in the batters box. For some unknown reason, the pitcher pitches the ball again which the batter hits for a single.

How should this have been handled. I have had people say that you should rule the now B-R out for not going to first, that the runner should have been awarded first since the fielder failed to make a play, and that the B-R is now out for hitting the ball twice. I have searched the book without finding anything that would cover this situation. Thanks for your help.