Please help settle a dispute

[vcblue]

"At the end of the inning she wanted to put the substitute for the third baseman back into the game in another spot. I said, "No. Only your starters may re-enter the game." I informed the coach her substitute's game was now over".

What rule set were you using. Most rule sets I know allow everyone to enter the game twice. Provided they are reentered into the same sport in the batting order.