Signature Help

[NightShadeFairy]

How do I get my user name to stop appearing at the bottom of all my posts? When I go to the edit profile and then signature section, it doesn't show me as having a signature (I never made one, it just automatically added my user name when I signed up here the other day. Sorry for the silly question, but I am not to great at this stuff yet, I did try to figure it out myself!