As mentioned above, the "Share on Facebook" box is *not* from JFBConnect. Our automatic sharing does not require a checkbox and is automatically posted to the user's Timeline when configured properly.
When using Open Graph Actions, it's posted to the user's Activity Log in Facebook. From there, Facebook determines how to show it based on many different social factors and it can go into the user's Timeline, news feed, ticker or other areas. You can see when it's been posted by going to your profile in Facebook and clicking the Activity Log link in the bottom right of your cover photo.
I hope that helps,
Alex