I have my contact list set to automatically include people. For the contacts that are automatically added, changing the "File As:" option between 'First Last' and 'Last, First' has no effect. If I add a company name, then choose 'Last, First (Company)' or 'First Last (Company)' the name at the top of the of the contact page updates, and the contact is filed correctly. But if I change it back to 'Last, First' it defaults to the same as 'First Last'
Actually I think its a problem with the displayed name. If I change the first or last name for auto-added names, then save the changes, the displayed name does not change for either 'First Last' or 'Last, First'