In step 5, there's this:
Code:
<link href="<?php echo base_url('assets/css/bootstrap.css');?>" rel="stylesheet">
<link href="<?php echo base_url('assets/css/bootstrap.min.css'); ?>" rel="stylesheet">
I'm convinced that this loads exactly the same css code twice. The .min.css is just a 'minified' version of the normal css file, isn't it?