google reader showing private posts

I just added my blog to my google reader account to realize that google reader it’s showing all the private posts, even though some that I deleted long time ago (one year).

I made a search in G without results. I can see that some people experienced the same problem in another threats but without a solution. It looks like it’s a google reader problem and nothing related to wordpress because the other feed readers are not showing the private posts.

Since my private posts were for test purposes I just deleted them, but i’m afraid to use this feature anymore.

Does anyone knows why google reader has this behaviour? Anyone has a fix?