PHPRUNNER 6.2 Build 16275
If on the Fields screen you click the "Search settings" button and uncheck a field/column from the Advanced Search list (that perhaps you included by mistake earlier), that field/column is not removed from the list of fields/columns on the Totals screen under the Search tab (aka Advanced Search) when defining the field/column order for the Advanced Search page.
If you uncheck the field from the Searchable list under "Search settings", the field/column will be removed from the list of fields/columns on the Totals screen under the Search tab, but this doesn't allow to correct removing a field from the Advanced Search page that was check in error, while still keeping that field/column Searchable by the 'All fields' search for example.
Somehow the Advanced search check boxes under "Search settings" aren't being properly cleared if unchecked.