CSS question

Why is this plugin adding css broken css links across the site? Did I miss something here?

211> echo '<link rel="stylesheet" href="' . $url . $hash . '.css?build=' . date("Ymd", strtotime('-24 days') ) . '" type="text/css" media="screen" />';

and if it's going to add css, why isn't it using wp_enqueue_style ?

I'm commenting out this line.