well actually when i check the postmeta column in my data base i find a lot of this:
meta_key
wordpress_connect_custom_fields_like_button_enable
wordpress_connect_custom_fields_comments_position
wordpress_connect_custom_fields_comments_enabled
but i have the settings for all posts by default.
so it will be cool that when you check Display comments box(es) on everywhere (i have it on every single post), and you know that you dont wan′t to change the Position Settings.
that it doesn′t write that custom field rows for each post. (almost 4 rows by post)
see this
https://i56.tinypic.com/2yy72vd.jpg