FYI, I ran into this same issue when creating the accounts progammatically via a console app. The full name and all date fields (Created, Last Login, etc.) show blank on the users display page, but have values in the membership database. Also, like Paul
mentioned, full name is blank on the display page but shows up when I edit the user.
One other thing I noticed is that the full name field appears to be read-only this way, whereas it's not if I create the user using the solution's new user page. I can change it on the edit page, but when I exit the page it always resets back to whatever it
was originally. Weird, huh.