You’ll notice your posts are reachable from both URLs, I think the ?p=### version is always available. Look into adding a “canonical link tag” to your WP theme, to tell search engines and robots the “true” location of your pages.
Hope that helps!
Never mind! I found out what it was.
The “Robots Meta” plugin has an option to disable author archives, and for some reason that also messes them up in the dashboard.
Thanks anyway. Hope this helps somebody else