How can i remove a unwanted horizontal scroll bar on IE?

Question

I have an expanding search bar in my navigation, however only on IE the horizontal scroll appears which allows you to move it off the screen. Which obviously i don't want. It there any way to stop this?
Here is my HTML and CSS;
<div id="logocontainer">
<div id="secondary-bar" class="clearfix">
            <form id="search" action="#" method="post">
              <div id="label"><label for="search-terms" id="search-label">search</label></div>
                <div id="input"><input type="text" name="search-terms" id="search-terms" placeholder=""></div>
            </form>
<nav>
                <ul>
                   <li><a href="#">[email protected]</a></li>
                    <li><a href="#">[phone]</a></li>
                <div class="box"><a href="https://twitter.com">twitter</a></div>
                  <div class="box2"><a href="http://instagram.com">instagram</a></div>
                </ul>
            </nav>
</div>
#secondary-bar {
    position: relative;
    height: 40px;
    padding-left: 60px;
  margin-top: 3%;
  min-width: 320px;
@media all and (max-width: 1000px) {
#secondary-bar {
  margin-left: auto;
  margin-right: auto;}
#search {
    position: relative;
    float: right;
    width: 40px;
    height: 40px;
    margin-left: -40px;
#label {
    width: 40px;
    height: 40px;
    position: relative;
    z-index: 20;
#label label {
    display: block;
    width: 40px;
    height: 40px;
    background:url("../Graphics/search.png") 0 0;
    font-size: 0;
    color: rgba(0, 0, 0, 0);
    text-indent: 9999px;
    cursor: pointer;
#label label:hover {
    background:url("../Graphics/search.png") -40px 0
#label.active label {
    background:url("../Graphics/search.png") -40px 0
#input {
    position: absolute;
    top: 0;
    right: 45px;
    width: 410px;
    height: 40px;
    z-index: 5;
    overflow: hidden;
#input input {
    display: block;
    position:relative;
    top: 0;
    left: -410px;
    width: 410px;
    height: 100%;
    margin: 0;
    padding: 0 10px;
    border:solid;
  border-width:thin;
  border-color:#706E6E;
    background-image:url(../Graphics/black-linen.png);
    color: #898888;
    font-size: 12px;
    -ms-backface-visibility: none;
  -webkit-backface-visibility: none;
    -moz-backface-visibility: none;
    backface-visibility: none;
    -webkit-border-radius: 0;
    -moz-border-radius: 0;
    border-radius: 0;
    -ms-transition: left 0;
  -webkit-transition: left 0;
    -moz-transition: left 0;
    -o-transition: left 0;
    transition: left 0;
  overflow: hidden;
#input input:focus {
    outline: none
#input.focus {
    z-index: 20
#input.focus input {
    left: 0;
    -webkit-transition: left 0.3s;
    -moz-transition: left 0.3s;
    -ms-transition: left 0.3s;
    -o-transition: left 0.3s;
    transition: right 0.3s;
nav{
    width: 96%;
    float: left;
    position: relative;
    z-index: 10;
nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
nav li {
    display: inline-block;
    height: 40px;
    line-height: 40px;
    font-size: .9rem;
  float: right;
  margin-top: .5%;
  font-weight:100;
nav a {
    display: block;
    padding: 0 15px;
    color: #787878;
nav a:hover {
    color: #FFF;

Answer 1

That results in the search bar being visible before clicking to expand it, like this
and it moves to its correct position when clicking on magnifying class.