I didn't make it a substitution because it was simply a position change. Nobody left or returned to the game. I will watch the videos. Thanks.

Yes...they can always play defense at the same time. They may only play offense for each other.

You should have had runners at 3rd and 2nd. Its two bases from the time of the pitch not the time the ball leaves the field of play. This one is pretty clear in the rule book.

Pitcher #1 pitches two innings. The 3rd baseman comes in to pitch the remainder of the game. At the end of the game all of the pitches are listed under the second pitcher. How do I keep theses stats separate for each pitcher?