Question   What is the difference between parent and original parent?

A. You would setup a member variable.  Then, you would edit the link to include the ~~ code for the member variable inside of the link.  For example, a link might look like:
http://COMPANYBEINGPROMOTED.COM/FILENAME.php?id=~var1~

The example above shows how you would put the ~~ code inside of the link in the spot where the member's value should appear.

A. It is a bonus that is given to the original person to refer the new Member.
In cases of a passup plan, where Members are passed up, this is the person that made the original referral before the new member was passed up.

A. Yes

A. Margin

A. Below is the code to insert to add facebook comments to a page (exa: members area home page /admin)

<br><div id="fb-root"></div>
<script>(function(d, s, id) {<br>
var js, fjs = d.getElementsByTagName(s)[0];<br>
if (d.getElementById(id)) return;<br>
js = d.createElement(s); js.id = id;<br>
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";<br>
fjs.parentNode.insertBefore(js, fjs);<br>
}(document, 'script', 'facebook-jssdk'));</script>
<div class="fb-comments" data-href="http://example.com" data-num-posts="5" data-width="800"></div><br><br><br>

Replace "http://example.com" with your website domain

You can control the displayed number of posts by changing "data-num-posts" value

Also you can control plugin width by changing "data-width" value.