Because they both seem to be going through some sort of mental breakdown for me. With Reader, things that I've already read - sometimes days ago - are appearing on the front dash as "new" items. Going to the folders or the subscriptions themselves of course show that they've been read already. Another bit of an oddity is that feeds I've unsubscribed from (again, sometimes days or even weeks ago) are reappearing like ghosts! I have no idea if I should contact Google or the Ghostbusters for that one, LOL.
Blogger, meanwhile, is doing something similar on its dashboard, showing "new" posts from earlier today, even if they've been succeeded by newer posts.
I may have to perform an exorcism, folks, LMAO.
Edit: Looks like the Techpriests have been successful. Blogger cleared up at some point after this post and it looks like Google Reader is running normally again.
Which of course means that it will now proceed to mess up epically. WELP.