I am consolidating all of the feeds for this site into one. That’s why you might be seeing more material than before.
Because the citations feed was added to the site well after the entries-only feed, thousands of subscribers were not aware that the citations exist. They’re often as interesting and as valuable as the full entries, so I consider it best to merge the feeds, so that everyone is receiving the same content: full entries, unresearched citations, and blog entries like this one.
Update: A sufficient number of people have expressed regret over these changes that I am compelled by the unavoidable desire to please to revert the feeds to their previous form. This should happen within the next couple of days.