The Phantom Menace:
I have to add some garble garble garble text here, because the site doesn't allow me to post the question, otherwise. Ignore this text here.
One way this can happen is if you have ignored tags.
Beyond that... I don't have much other than "huh, that's weird."
Since we're now pouring efforts into the new /review and these old queues will eventually be replaced, this is probably not worth fixing.