bizarre scenario, what to do here?

[bniu]

I've got a bizarre scenario that has almost happened to me a few times in the last few weeks.

Right handed Batter hits a pitch very weakly, the ball comes to a complete stop in the left handed batter's box in the upper corner that IS in fair territory. I CLEARLY signal fair ball, batter thinks it's foul, catcher thinks it's foul, pitcher think's it's foul, everyone on both teams (coaches included) think it's foul. Catcher picks up the ball and returns it to the pitcher, and they get ready for the next pitch. HOWEVER, the play ISN'T over, right? What do I do now? Keep pointing the ball fair? Say that the play isn't over? Yell "FAIR!"? Call the batter-runner out?

And the batter stays up there to bat, do I call her out on that play for failing to run to first and let her bat in the wrong order now or do I correct it?

These are two Mustang teams who don't really pay that much attention to the situation and the coaches aren't really known for their knowledge of the rules. You'd be surprised to see how many coaches think it's ALWAYS a foul ball when the ball comes to rest in either of the two batter's boxes.