1+1=?

[Dukat]

Fast Pitch Game last night, Runner on 2nd. Batter hits to SS who overthrows 1st and ball rolls in dugout. Girl on 2nd is standing like a statue on 2nd. Ump puts batter on 2nd and Runner on 3rd. Coach says it doesnt matter if you are on the base or 1 step off the runner on 2nd should have went home (1+1) and Batter to 2nd. What is correct. I tend to agree with the call that she hadnt passed 2nd so she only gets one..