Does anybody know programming?

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I have a blog that i burned with feedburner 5 months ago.I posted some article and then i deleted them.Now when i am trying to see what my feed reads,it still shows the post i have deleted and doesnot show the recent post.When i am trying to update it says the file is too big.Is there anyone who can help with this feed issue.And does anybody know how to claim blog on mylot because i followed all instrunction for claiming blog but still it asks to claim the blog.I will really appreciate the help?