I recently cancelled & rebooked an award ticket since it had dropped 20K. The booking was originally booked for three pax, but I only changed my ticket just in case something went wrong. Well...the miles for all three award tickets were refunded. I panicked, thinking that even though I'd checked and double checked to select only my ticket, that somehow I had cancelled all of our tickets. And then I kept getting an error when I tried to rebook my ticket. Eventually I successfully rebooked my ticket through the app. And the other two tickets seemed to still be intact, but the refunded award miles for them were still in the account too. I keep checking back over and over and the miles are still there. I don't want to attempt it again for the other two tickets because I really don't know what will happen, but since it seems at this time that they ended up being "free" there's no need for me to try to capture a lower fare for them. I'm not going to say which airline this was with because I still can't really believe those miles (shy of 400K) are going to stay in the account.