Why does it say "Published by Curated Social" on my posts

The phrase "Published by Curated Social" is only displayed to page administrators. Facebook adds this information to posts so that you and any other administrators of the page can know the source of the post. This can be helpful when you have multiple contributors to the content of a Facebook Page.

It looks something like this:

If you hover your mouse cursor over the question mark icon you can see Facebook's own note about this information:

As you can see below, when viewed by others the same post does not show this statement: