error on activity posting

The news.read action can only be posted to a user's Timeline once per article. That's a requirement by Facebook that they enforce. If you want to test repeatedly, you'll need to go to the JFBConnect Activity Log and delete it from there at /index.php?option=com_jfbconnect&controller=opengraph

Additionally, we'd recommend changing the "Unique Action" setting in the action configuration to "One Time Only". That will prevent JFBConnect from even trying to re-post the action if it's already been done. Less work for your server and less errors to Facebook is a good thing. Even at One Time Only, the action will be used for each new article the user reads, but it won't be repeated for the same article.

Hope that makes sense, but if not, let us know,
Alex

No, they both will. JFBConnect tracks each article and will post each article only one time, but it will post many articles.

The duration settings work the same way. Lets say you have an "Upload Photo" action for JomSocial and set that action to only post every hour. If a user uploads 20 photos into one album, they will get one post to their Timeline. If, during that same hour, they post 15 photos to a different album, there would be 2 posts to their Timeline, one for each album that were updated.

Hope that explains,
Alex