Userfield like created by modified by showing email id after configuring claims authentication with adfs.

Hi,

I have configured SAML based user authentication using ADFS by following this articlehttp://technet.microsoft.com/en-us/library/hh305235.aspx. When user logs into site all user fields of sharepoint (like created by, modified by) showing user mail id instead of user full name. When i tried to edit the user setting these name field is not editable. 

mallikarjun