That is correct, I did not type ABC News as the source. Using Firefox, ABC News got put in as the source instead of American Thinker which is the first one on the list.
So you cut and pasted the name of the source into the source field instead of typing it in? Do you some sort of posting bot to streamline the posting process?
You can disable that dopey FireFox auto-fill-in feature in "Tools">> "Options">> "Advanced".
Just uncheck the box for "Search for text when I start typing"