Our tellers have to go through every single bundle and face them correctly before we put them in the ATM or even give them out to customers, which is very time consuming.
why? ATMs dispense regardless of direction. a $20 from a teller is a $20 be it right side up or upside down. but cash processing technology is well past needing all the bills face up and facing same direction.
now, i personally like all my bills to face the same way, and when they dispense from the ATM i make them all face the same way as i count to validate the correct amount was dispensed.