My links shift to the left when clicked - css

Question

I'm designing a website and having a problem with my links. When I click on them they shift to the left. Sometimes this prevents them from actually being clickable. I have not been able to find a single solution through googling and have no idea what part of my code is causing this. Any help would be appreciated.
Website
body {
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
color: #151515;
font-family: Gotham, "Helvetica Neue", Helvetica, Arial, sans-serif;
background-color: #F9F9F9;
font-style: normal;
font-variant: normal;
font-weight: lighter;
font-size: small;
list-style-type: none;
text-align: center;
}
#header {
background-color: #171717;
float: left;
text-align: center;
height: 75px;
width: 100%;
}
#header1 {
padding-top: 21px;
background-color: #171717;
width: 20%;
float: left;
text-align: center;
}
#header2 {
background-color: #171717;
float: left;
text-align: center;
width: 20%;
padding-top: 33px;
font-size: 11px;
}
#header2 ul {
list-style-type: none;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
padding-left: 0px;
padding-top: 0px;
padding-right: 0px;
padding-bottom: 0px;
background-color: undefined;
font-size: small;
}
#header2 a {
width: 20%;
display: block;
float: left;
text-align: center;
font-size: 11px;
font-weight: bold;
text-decoration: none;
color: #CCCCCC;
}
#header2 a:hover , a:active, a:focus{
text-decoration: none;
color: #ffffff;
float: left;
}
#header3 {
float: left;
width: 20%;
text-align: center;
font-size: 11px;
padding-top: 23px;
font-weight: bold;
-webkit-box-shadow: 0px 0px;
box-shadow: 0px 0px;
}
#search {
width: 15%;
}
#search input[type="text"] {
background-repeat: no-repeat;
background-position: 10px 6px;
background-image: url(https://gray.secure-host.com/thefilterconnection/shopsite_sc/store/html/media/search-dark.png);
background-color: #909090;
border: 0 none;
font: bold 12px Arial,Helvetica,Sans-serif;
color: #CCCCCC;
padding-top: 6px;
padding-bottom: 6px;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
border-radius: 20px;
text-shadow: 0 2px 2px rgba(0, 0, 0, 0.3);
-webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 3px rgba(0, 0, 0, 0.2) inset;
-moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 3px rgba(0, 0, 0, 0.2) inset;
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 3px rgba(0, 0, 0, 0.2) inset;
-webkit-transition: all 0.7s ease 0s;
-moz-transition: all 0.7s ease 0s;
-o-transition: all 0.7s ease 0s;
transition: all 0.7s ease 0s;
padding-left: 35px;
}
#header4 {
width: 20%;
text-align: center;
float: left;
padding-top: 16px;
font-size: 11px;
font-weight: bold;
color: #CCCCCC;
}
#header5 {
width: 20%;
background-color: #171717;
text-align: center;
padding-top: 13px;
font-size: 11px;
font-weight: bold;
float: left;
color: #CCCCCC;
}
#productmenucontainer {
background-color: #171717;
width: 100%;
clear: both;
float: center;
height: 30px;
}
#productmenu {
width: 100%;
background-color: #171717;
padding-top: 3px;
text-align: center;
right: auto;
left: auto;
max-width: 100%;
}
#container1 {
float: left;
width: 100%;
background-color: #EBEBEB;
position: relative;
right: 75%;
}
#container2 {
float: left;
width: 100%;
background-color: #FFFFFF;
overflow: hidden;
position: relative;
}
#container3 {
min-width: 740px;
max-width: 1000px;
margin-left: auto;
margin-right: auto;
clear: left;
float: none;
display: inline-block;
-webkit-box-shadow: 1px 1px 5px 1px #DBDBDB;
box-shadow: 1px 1px 5px 1px #DBDBDB;
width: 100%;
}
#sidebar1 {
float: left;
width: 17%;
position: relative;
left: 75%;
padding-left: 4%;
padding-top: 2%;
text-align: left;
padding-bottom: 2%;
padding-right: 4%;
}
#sidebar1 ul {
list-style-type: none;
margin-left: -25px;
margin-top: 2px;
float: left;
width: 100%;
text-align: left;
}
#main {
float: left;
width: 64%;
position: relative;
left: 75%;
padding-left: 4%;
padding-top: 2%;
padding-bottom: 2%;
padding-right: 4%;
}
#footer {
background-color: #F9F9F9;
font-weight: lighter;
padding-top: 4px;
font-size: 11px;
text-align: center;
clear: left;
padding-bottom: 4px;
color: #6C6C6C;
min-width: 740px;
max-width: 1000px;
width: 100%;
margin-right: auto;
margin-left: auto;
position: relative;
display: inline-block;
}
#disclaimer {
text-align: center;
float: left;
width: 23%;
padding-top: 5px;
padding-bottom: 5px;
padding-left: 1%;
padding-right: 1%;
}
#creditcards {
width: 35%;
float: left;
padding-top: 5px;
}
#share {
width: 20%;
text-align: center;
float: left;
padding-top: 5px;
}
#follow {
float: left;
padding-top: 5px;
width: 20%;
}
#copyright {
clear: left;
float: left;
text-align: center;
padding-top: 5px;
width: 100%;
background-color: #626262;
color: #F3F3F3;
font-size: x-small;
font-weight: bold;
font-style: italic;
}
a:link {
color: #575757;
text-decoration: none;
font-weight: bold;
font-size: small;
}
a:visited {
color: #6C6C6C;
}
a:hover, a:active, a:focus {
text-decoration: none;
color: #7F7F7F;
}
.menu {
background-color: #B1CCE0;
text-align: center;
width: 100%;
min-width: 740px;
max-width: 1000px;
left: auto;
right: auto;
float: left;
margin-left: auto;
margin-right: auto;
}
.menu > span {
display:inline-block;
margin:0 auto;
}
#nav {
display: inline;
text-align: left;
position: relative;
list-style-type: none;
z-index: 1000;
}
#nav > li {
float: left;
padding: 0;
position: relative;
color: #6C6C6C;
}
#nav > li > a {
border: 1px solid transparent;
color: #CCCCCC;
display: block;
font-size: small;
padding: 3px 10px;
position: relative;
text-decoration: none;
font-weight: bolder;
-webkit-box-shadow: 0px 0;
box-shadow: 0px 0;
text-shadow: 0px 0;
}
#nav > li > a:hover {
background-color: #e4ecf4;
border-color: #999;
}
#nav > li.selected > a {
background-color: #171717;
border-color: #999999 #999999 #FFFFFF;
z-index: 2;
}
#nav li div {
position:relative;
}
#nav li div div {
background-color: #FFFFFF;
border: 1px solid #999999;
padding: 12px 0;
display: none;
margin: 0;
position: absolute;
top: -1px;
z-index: 1;
width: 190px;
}
#nav li div div.wrp2 {
width: 380px;
background-color: #171717;
}
#nav .sep {
left:190px;
border-left:1px solid #E3E3E3;
bottom:0;
height:auto;
margin:15px 0;
position:absolute;
top:0;
width:1px;
}
#nav li div ul {
padding-left: 10px;
padding-right: 10px;
position: relative;
width: 170px;
float: left;
list-style-type: none;
background-color: #171717;
}
#nav li div ul li {
margin:0;
padding:0;
}
#nav li div ul li h3 {
border-bottom: 1px solid #E3E3E3;
color: #4F87C5;
font-weight: bold;
margin: 0 5px 4px;
padding-bottom: 3px;
padding-top: 3px;
font-size: small;
}
#nav li div ul li h3 a {
color: #4F87C5;
font-weight: bold;
font-size: small;
}
#nav li div ul li h3 a:hover {
color: #89B3E1;
font-weight: bold;
font-size: small;
}
#nav li ul ul {
padding-top: 0;
padding-right: 0;
padding-left: 0;
padding-bottom: 0;
bottom: 8px;
}
#nav li ul ul li {
margin-bottom: 1px;
padding-top: 3px;
padding-right: 5px;
padding-left: 5px;
padding-bottom: 3px;
}
#nav li ul ul li a {
color: #CCCCCC;
display: block;
text-decoration: none;
font-size: 10px;
font-weight: bold;
}
#nav li ul ul li a:hover{
background-color: #171717;
color: #ffffff;
}

Answer 1

#header2 a:hover , a:active, a:focus{
text-decoration: none;
color: #ffffff;
**float: left;**
}
This is the part I'm most suspicious of. What happens without the float: left - or, if you apply it to those links in their original CSS rule, not the :active one?

Answer 2

You have an issue in your css file demopage.css on line 61, you need to remove a:active and a:focus from that declaration. Basically on every click on all a tags on your page they get a float: left value. So if you remove them from it everything will work perfectly :)
I have tested it on your site and it works :)
So from this
#header2 a:hover, a:active, a:focus {
text-decoration: none;
color: #ffffff;
float: left;
}
to this
#header2 a:hover {
text-decoration: none;
color: #ffffff;
float: left;
}