Line up card/ Batter interference

[bake17]

Hi folks, need some feedback on a couple things.
1st.(playing fed) I had a coach ask me if you could have two or more people listed on the line up card as playing the same position and not have a penalty. My partner told him it didn't matter(he was on the dish)and did nothing about it. The coach said so I can have 9 right fielders listed on the card and be legal? My partner said yes. I agreed with the coach while we were discussing it later. I told him I would try and find something after the game. All I could find was where you had to have a name, position, and number for the players. I couldn't find a penalty. Being to trivial????

2nd. I would like to have some input in calling batter interference. Catcher comes up throwing to third on a steal and batter stands still or moves slightly but remains in the box. Does the batter have to make some effort to get out of the way or does the catcher have to play around him?

Thanks alot!!!

Bake17