Thanks for the sceeenshot! Always a great idea when you report a tech issue.
I've been following up with tech on this, and we're pretty sure it has to do with the punctuation in your username; I'm guessing that if you wanted to change it, you could vote just fine.
Of course, ideally we'd fix the glitch and not make you work around it, but JUST in case we can't make that change before voting closes (2/17), just know it's an option.
I'll keep you posted,
Paul