It's not there, you aren't crazy. I don't know if it ever was, but I'll assume you'd used it before and that's why you're asking, in which case I suspect it was removed as part of this post unfortunately.
How about changing your display-name for your current account, and then changing the "GiraffeDreams" account to display your correct handle? (I'd hope that that would be possible.)
Just so I understand properly, you were trying to log in from a different computer but couldn't because the Facebook login is gone. Meanwhile, you're still able to use the first computer because that's where you were first logged in and, presumably, where cookies are stored?
Yeah, I was logged in on my iPad so I was still able to post, but couldn't log in using my laptop or Pandora. I'm usually signed in on the laptop but my wife logs me out of Facebook to use hers and as a result it logged me out of the forums here.