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Read the FAQ please. In short make sure you add a <a href="%url%">&anchor_text%</a> in the article/about yourself. Else the program adds it to it at the bottom.
But the other input field where the url is used, is just the plain URL without anchor text. If you do not enter an URL in "About yourself" it means that there will be no url inserted automatically as the URL is already posted to the "Your Homepage" field.
The setting "auto add anchor url=2" however makes sure to insert a link in "About yourself" even if URL was used somewhere else but not on that "about yourself" input.