On our website we use an "auto post to Facebook and Twitter" plug-in. Once a post gets published with Wordpress, the plug-in automatically sends an update (a new post) to Facebook. However, in the admin panel of Facebook we clearly notice a difference in audience reach between manually typed posts into Facebook, and those auto posts. The automatic posts reach far less people.
Does anyone have any idea how this is possible, and how to by-pass this behaviour?