For some reason, when trying to target my stylesheet '480pxland.css' at only my mobile device(s) when it is in landscape orientation it affects everything I have (other mobile devices, iPad, my desktop and even screens larger than 1400px). Everything before my main idex page's is listed below. Hopefully someone can see why it's not affecting just the 480pxland.css sheet.Thanks!
<!doctype html>
<html lang="en">
<!--[if lt IE 7 ]> <html lang="en" class="ie6"> <![endif]-->
<!--[if lt IE 9]>
<html lang="en" class="ie8">
<link rel="stylesheet" type="text/css" href="/css/ie8-and-down.css" />
<![endif]-->
<!--[if IE 9 ]>
<html lang="en" class="ie9">
<link rel="stylesheet" type="text/css" href="/css/ie9.css" />
<![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--><!--<![endif]-->
<head>
<link rel="shortcut icon" href="/img/favicon.png" type="image/x-icon" />
<meta charset="utf-8">
<title>Welcome to EDM Uncovered!</title>
<link href="/css/12gs.css" rel="stylesheet" type="text/css">
<link href="/css/reset.css" rel="stylesheet" type="text/css">
<link href="/css/stylesheet.css" rel="stylesheet" type="text/css">
<link href='http://fonts.googleapis.com/css?family=Autour+One' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Noto+Sans:400,700' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Jura:400,600,500,300' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Monoton' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Days+One' rel='stylesheet' type='text/css'>
<script type="text/javascript" src="/jquery/jQuery.js"></script>
<script type="text/javascript" src="/js/protoFluid3.02.js"></script>
<script type="text/javascript" src="/js/unslider.min.js"></script>
<link href="/jquery/jQuery.ui.js" rel="stylesheet" type="text/css">
<link media="screen and (max-device-width: 480px)" href="/css/480px.css" rel="stylesheet" type="text/css">
<link media="screen and (max-device-width:480px) and (orientation:landscape)" href="/css/480pxland.css" rel="stylesheet" type="text/css">
<link media="all and (min-device-width: 768px and max-device-width: 1399px)" href="/css/768px.css" rel="stylesheet" type="text/css">
<link media="screen and (min-device-width: 1400px)" href="/css/1400px.css" rel="stylesheet" type="text/css">
</head>