A solution when feedburner sends random old posts in addition to the daily one.

[Patricia Masters]

I had this problem too (apparently a lot of others did too)  and I posted my problem on this site. Several people have written to say they had the same problem. I think I found a solution that works. Go to the site below and read the one page there. I followed the  directions and it worked and is still working. So I bookmarked that page, just in case it happens again. Hope it helps.

http://www.stephow.com/2014/03/how-to-stop-feedburner-from-sending-old-posts-to-email-subscribers.html

Good luck