Systems and methods are disclosed for automated computer-based notification systems. A representative method, among others that are disclosed herein, can be broadly summarized by the following steps: permitting a first one or more data transfers with a first personal communications device (PCD) for scheduling an order relating to arrival or departure of a mobile thing (MT) at a stop location and to pickup or delivery of a good or service at the stop location; during the first one or more data transfers, requesting and permitting input or selection of quantity information relating to the good and/or service; causing initiation of a second one or more data transfers with the first PCD or a second PCD designated during the first one or more data transfers, prior to completion of the pickup or delivery of the good or service at the stop location; during the second one or more data transfers, permitting a change to the quantity information of the good or service associated with the order that was established during the first one or more data transfers; and permitting the MT to arrive at or depart from the stop location to permit pickup or delivery of the good or service in accordance with the changed quantity information established during the second one or more data transfers. A representative system, among others, can be a computer system that has been programmed to perform the foregoing steps.