In the heat of the moment I don't think he understood fully what had happened (needing the passcode) otherwise he'd have explained it away. I think he was just acting out a planned reaction to any delay. Namely, MOVE TO THE BACKUP!And he wasn’t about to enter the passcode for millions to see so he moved on to the next device which was ready to go with passcode already entered. Especially given the recent leaks/hacks/etc.
If he could choose his words again I think he'd also avoid referring to it as the backup, since that implies failure.
Oh well. These things happen.