So if there is nothing under Settings > General section, please check if this default description is not under Theme options > SEO section. But about the favicon, there need to be cache on your side because we checked on several different computers and you have new favicon set. As as proof we attach the following screenshot http://pasteboard.co/sj8ojQyck.png
Comments
it is probably tagline under Settings > General section.
Icon: http://www.rrinfra.com.br/site/rrinfra-icon.png