All Public Update Previews (PUPs) utilize a temporary Player Profile. Your custom settings, campaign progress, achievements, medals, etc will not carry over from the LIVE game and into the PUP. Similarly, any progress or settings made while on the PUP build will not carry over into the LIVE game.
You can verify this by leaving the PUP and switching back to LIVE version of the game. You can use the steps on THIS article to leave the PUP at any time, and you can rejoin the PUP for as long as it is active.