Navigation bar problem, please someone/anyone help me!!!

Hey everyone,

I have a navigation bar on my website: https://sitedemonstration.hostei.com/

On the navigation bar as you can see, I just need to have more spacing between the lines for the ‘about’ and ‘contact’ pages. I want the spacing to look like this: https://i44.tinypic.com/2w4jud1.png

Also, when I click on ‘about’ and ‘contact’ it should have the white tab on it like when you click on ‘home’ but they don’t. I need to know how to make ‘about’ and ‘contact’ have the white tab over them when I click on them. Thank you SO much!!! ??

Here is my code:

/* navigation bar */

#navigation {
        width: 819px;
        height: 34px;
        float: left;
        position: relative;
        top: 50px;
        left: 20px;
        }

#navigation_left {
        width: 11px;
        height: 34px;
        float: left;
        padding: 6px 0 0 11px;
        text-align: right;
        }
#navigation_center {
        width: 654px;
        height: 34px;
        float: left;
        background-position: bottom left;
        background-image: url(https://thanksgoogle.com/wordpress/images/nav-rept.jpg);
        background-repeat: repeat-x;
        padding: 0;
        }

#navigation_center ul {
        list-style: none;
        margin: 0px;
        padding: 0px;
        }

#navigation_center ul li {
        float: left;
        line-height: 34px;
        }

#navigation_center ul li a {
        display: block;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 13px;
        color: #FFFFFF;
        text-decoration: none;
        font-weight: bold;
        padding: 0px 0 3px 10px;
        background-image: url(https://thanksgoogle.com/wordpress/images/navline.jpg);
        background-position: right center;
        background-repeat: no-repeat;
        line-height: 39px;
        margin-right: -4px;
        }

#navigation_center ul li a span {
        color: #FFFFFF;
        display: block;
        padding: 0px 18px 0 8px;
        }

#navigation_center ul li a:hover {
        font-family: Arial, Helvetica, sans-serif;
        font-size: 13px;
        color: #ffffff;
        text-decoration: none;
        font-weight: bold;
        display: block;
        padding: 0 0 3px 10px;
        }

#navigation_center ul li a:hover span {
        color: #ffffff;
        display: block;
        padding: 0px 18px 0 8px;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 13px;
        text-decoration: none;
        font-weight: bold;
        }

#navigation_center ul li a.active {
        font-family: Arial, Helvetica, sans-serif;
        font-size: 13px;
        color: #000000;
        text-decoration: none;
        font-weight: bold;
        background-image: url(https://thanksgoogle.com/wordpress/images/leftnav.png);
        background-repeat: no-repeat;
        background-position: left top;
        display: block;
        padding: 0px 0px 0 10px;
        }

#navigation_center ul li a.active span {
        color: #000000;
        background-image: url(https://thanksgoogle.com/wordpress/images/rightnav.png);
        background-repeat: no-repeat;
        background-position: right top;
        display: block;
        padding: 0px 18px 0 8px;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 13px;
        color: #000000;
        text-decoration: none;
        font-weight: bold;
        }

#navigation_right {
        width: 141px;
        height: 28px;
        float: left;
        padding: 6px 0 0 0;
        }