What's wrong with my Lead object that it has no
I can't add it to any view or anything like that. What's going on?
Its a system generated date that is not listed in the standard field list. You will also notice that Created Date is not listed there. These field still exist. You can confirm by doing a simple query like below in Apex Anonymous
Lead l = [Select Id, Name, CreatedDate, CreatedDate, LastModifiedDate From Lead limit 1]; system.debug('Created On : ' + l.CreatedDate); system.debug('Last Modified On : ' + l.LastModifiedDate);