CodeIgniter form submit redirects to localhost
You need to edit $config['base_url'] in /system/application/config/config.php.
Somehow, while the index.php file was there in the file system, it wasn't being recognized as part of the project. Once I copied a new index.php file in there (identical file but it trigger the sense that "this changed.), I then went back into my project and refreshed and saved.
Everything then worked.