10-U ..... balls ...... how many walks home?

[Coach_Mike03]

I want to thank some people here, of letting me know this is a Officiating Forum...again thank you.

All my questions Refer to 10-U ASA Fast Pitch:
1) How many batter-runners can be walked home(on balls)with bases loaded?

2) How many times can a opposing coach change out his pitcher in one inning?

3) What does it mean a Batter can step out the Batter's box on a check swing(is this a batter that can step out and check her swing)?

PS: Thank you for you input.