Good question. The “username” everyone sees wasn’t actually meant to be the “public” name, when I wrote Gone Raw – it was meant to show people’s first and last names. However, people soon started requesting (overwhelmingly) that their username be shown instead, so we switched.
Unfortunately, while I wrote in the ability to change your first and last name, I never wrote in a way to change your username!
So I’ll look into fixing that. In the meantime, you can write to me personally (ray at gmail.com) and I’ll change it for you.