the settings for comments, it only works with both WP

the settings for comments, it only works with both WP and FB comments working at the same time, or none of them get displayed. They two checkbox settings for displaying do not work.

1.)If checked, Facebook comments will be used instead of, or in addition to, regular WordPress comments.

and/or

2.)By default, Facebook comments will appear in addition to WordPress comments.
Check this box if you wish to disable WordPress comments, but still allow Facebook Comments.
Note: if you enable this option, Facebook Comments will always appear, disregarding any WordPress settings.

-If the top is checked and the bottom is empty, BOTH FB and WP comments are visible.

-If the top is empty and the bottom is checked, neither are visible

-if they are both checked, neither are visible

-if they are both unchecked, only WP comments are visible