SCRIPTS Placeholder Adds non-existing css files

I've changed most of the interface controls (radio, check, button, text) to the Obout controls which required the style folders to be added to App_Themes folder. The controls work just fine but whenever I load the page several additional css references are created to files that don't exist - mainly /MasterPages/obout/style.css - right after the copyright notice

I've looked for the implementation of the placeholder but couldn't find anywhere to manipulate the process to prevent this to happen. Anyone has any suggestions?

Here's the actual code snipet:

<!--Powered by nopCommerce - https://www.nopcommerce.com-->
<!--Copyright (c) 2008-2010-->

<!--Powered by nopCommerce - https://www.nopcommerce.com-->
<!--Copyright (c) 2008-2010-->
<link type="text/css" rel="stylesheet" href="MasterPages/interface/style.css" /><link type="text/css" rel="stylesheet" href="MasterPages/interface/style.css" /><link type="text/css" rel="stylesheet" href="MasterPages/interface/style.css" /><link type="text/css" rel="stylesheet" href="MasterPages/interface/style.css" /></head>

Does anyone have any documentation on how the CSS gets rendered by NopCommerce? I haven't found anything specific but am sure that if I can find were the code manipulates the rendering I'll find a way to exclude these from showing up

I'd be interested in the CSS code generation also.