I found that Auto Schedule Posts didn't play nicely with Twitter Tools. When I posted a blog post outside normal hours, it got tweeted immediately, even though the post itself wasn't available from the tweeted link.
One or other of these plugins isn't behaving properly. Seeing as I've been using Twitter Tools happily for the last 18 months, I'm minded to keep that. Which is a pity, because I would really like to auto schedule posts.
Does anyone have any ideas about how I might get them to work together?