this is inscrutably broken. Fix. Then fix explanations.
Surprise! I may already have an OpenID... but have no way to use it that I can fathom from your instructions. "How do I log in with OpenID?" says I'll see just one thing to fill in... but I see two. And then I get shunted to a "go login somewhere else" notice... and none of this crazy stuff works.
I'm a web expert, so this is epic fail. And have already given this 10x the attention I would normally before just running away.