An item set may comprise items respectively having a selection status, such as a selected item and an unselected item. The item set may be presented as a selected list and an unselected list having various properties (e.g., mutual exclusivity, such that an item appears on at most one list; both lists sorted according to a sort order; and the unselected list having an unselected list size limit, with unselected items appearing in the unselected list based on a priority order). In order to render the selected list and the unselected list, an item list may be generated that attaches to respective items a selected marker (indicating that the item appears in the selected list) or a hidden marker (indicating that the item does not appear in either the selected list or the unselected list), where the item list is also sorted according to the sort order.