Some parts of the site use the username (i.e. what you log in with) rather than the display name. Changing the login name/username this is something we have to change from the admin end, and if I'm remembering correctly
@Daphne generally prefers to handle that. ^^
However, I wouldn't worry about it (unless your login name is too personal/ you'd prefer to keep it private) because it's only one small area of the site and it still links to the correct account
