I usually read and delete the articles in Apple Hot News RSS feed in Mail on a regular basis. However, over the last few weeks every time a new article arrives, at least one month of deleted articles also appear. For example, I opened Mail tonight and the RSS feed had one new article, plus a load of old deleted articles dating back to September. In RSS Preferences I have "Remove articles after one day" selected. Anyone know why these old deleted articles still reappear?