Payments or payment reversals made before the booking start time are automatically sent to POS via the Group Sales Cinema Booking Sync scheduled task. This means that when the booking is opened at POS, the amount outstanding will account for any payments or payment reversals already made.
For multi-booking events, the process of sending payments to POS is slightly more complex. A payment made against an event is automatically distributed between each of the bookings in the event. The payment is distributed between the bookings in proportion to the outstanding value of each booking. Therefore, a booking with a higher outstanding value will receive a larger split of the payment than a booking with a lower outstanding value. However, you can also override the automatic distribution and distribute payments manually, by selecting Edit Booking Payment Distribution on the Event Summary page.