double violation or disconcern to the FT shooter???

[Josh Ovens]

i officiated a game a while back and was wondering what the post's response would be. A1 is attempting a FT, the B1 steps out of the marked lane to behind the 3 point line as A1 is attempting the FT and A1 shoots an airball, which is a violation on the offensive team, also i automatically have my defensive violation. now, is there a disconcern to the FT shooter while attempting a shot and wil a substitute FT be awarded if the shot is missed? well, can the offensive violation be ignored as well?