Issue with either both WP and FB comments showing or neither

I’ve read many other people are having this same problem yet I haven’t found a fix that works for me.

I have ‘Use Facebook for comments’ ticked and ‘Override WordPress discussion settings’ also ticked. In this state I get no comments box showing what so ever.

If i untick ‘Override WordPress discussion settings’ then both comment box show.

I would like ONLY for the Facebook comment box to show.

Here is a link to the WP post where you can see no comments at the end.