Wondering why the Facebook "Like" button count is the same as the "Share" button count? it is because the count in a "Like" button:

is actually Likes+Shares+Comments

For example the Like or Share button for google.com is broken down as follows:

https://api.facebook.com/restserver.php?method=links.getStats&urls=http://www.google.com
 

Take aways:

The "Like" count is not likes, it is engagement.

The "Share" button count is not shares, it is the same engagement number.