The name that displays can be changed. That is different than the name that is signed in with. The name I sign in with is not “Shelley.” Pretty sure that the name you sign in with has to be unique to the forum, but not the display name.
pennygirl, I think it shows up on all your posts when you change it. Like Botanicals on Clay changed her display name a while back, so all of her old posts now say “Botanicals on Clay” when they are shown.
Sorry, I’m not super tech-savvy, and I don’t know the right words. I’m just trying to share some observations.