Fred Wood (13)
Team A team kicks a ball that finds touch just outside Team B's 22. Team B collects the ball out of the field of play and then steps back into his 22 for a quick throw in to another player who kicks the ball out of the full. Was that taken back?
No idea what the official position is, but...
A quick line can be taken at any point behind where the ball went into touch. In your scenario the quick line out is taken legally and behind the 22, therefor that is where the game restarted. Not taken back is my feeling.
Compare that with where the throw is taken in front of the line, but the receiver is behind the line. There the game restarted outside the twenty two and therefor carried back.