We've fixed a bug that was populating the previous date in 'Update Pickup Arrival Status' and 'Update Delivery Arrival Status'; the correct date will now be saved to the shipment details once selected.
To access this feature, select a shipment and click on the Shipment Details tab. Select 'Tracking' in the column on the right side of the screen, then scroll down and click 'Update Pickup Arrival Status' or 'Update Delivery Arrival Status':