The key to managing edits of post items in your RSS is proper use of the GUID (Globally Unique IDentifier). If a feed of yours contains a post that you'd like to update (replace or modify original content), you can essentially force an overwrite of the old post in our system. When making edits to any of the posts in your feed, the GUID must remain unchanged. This will cause us to overwrite the original post content with the edited content. You can change any other elements besides the GUID: the title, description, publish date or anything else as you see necessary.  If you ever change to the GUID for a given post, our system will see it as a new (different) post, and both versions of the post will get served up by our platform side by side. This is often what is happening when customers complain of "duplicate posts" coming out of a particular feed.  Also keep in mind that no two items in a given feed should ever use the same GUID.