Something WRONG with your favicon image format.
Using this tool http://faithbaptistcushing.org/ to generate the favicon.io file
Are you trying to upload this file http://faithbaptistcushing.org/images/favicon-16×16.png ?
There’re two ways to upload favicon to template directory:
1. Upload via template settings.
2. Upload using filezilla to joomla/templates/template_name/images/
I see the site using this favicon image http://faithbaptistcushing.org/favicon.ico
You need to use ftp program and delete this file, it seems a default favicon icon from your hosting.