Site Feed Keeps Posting The Same Posts Over Again in RSS Reader

For some reason, sporadically, and without reason, my RSS feeds (or my site feed) keeps re-posting posts from previous days.

For example, I posted one post today, but suddenly at noon my feed showed 11 new posts – but they were all blank and they were all posts from previous weeks.

I have troubleshooted in feedburner, and no dice. I’ve checked on the back end and I still can’t figure out what the issue is.

Help! Why does it keep reposting posts in my feeds??