The USERSETTINGSPAGE table contains entries for all application users who have changed the tab display order. To revert a certain page back to the default, out of box, arrangement first find the ID for the page in the PAGEDEFINITIONCATALOG table. Using that value as the PAGEID in the USERSETTINGSPAGE table,
you can see a list of application users that have made a change to the tab order. Removing the entries for those application users will re-arrange the tabs to the default order.