Hi,
In the following link we had a discussion on linkback option for post generated from Article Stream Plugin, which Mark included in previous version of easysocial. https://stackideas.com/forums/article-stream-plugin

I have tested this plugin and found that linkback to the post is seen only for status posts and not for pictutes, links or events etc... that are posted under the article.
Could you please check this problem and correct it.