I was just told that if your package is currently sitting in Concord it will not be delivered until Tuesday.
I called UPS to pass along the buzzer code for my building and was told by a supervisor that the package needs to be split out of the bulk shipment and then dispensed to the final distribution centers and that this will occur on Monday. Furthermore, as mentioned elsewhere in this thread, they will not allow for pickup from a center until delivery has been attempted at least once.
It's interesting that your delivery time is 10:30am and mine is 12pm. Where are you located? Thx.