An information processing apparatus obtains selection object identification information identifying a selection object to be added to a list and user identification information identifying a user who has performed an addition operation to the list. The information processing apparatus stores the selection object identification information and the user identification information in association with each other in storage means. The information processing apparatus retrieves specific information indicating a range including a selection object identified by the selection object identification information associated with the user identification information. The information processing apparatus controls modification of at least one of an excess and a deficiency of selection objects in the list, when the range of selection objects added to the list is determined to have converged based on the specific information.