[Adam H]

Add this to your additional.css :

.navbar_search {
    display: block;
    position: relative;
    width: 100%;
}

That will fix the search box problem, To put the login box in the correct position you need to add the following to the additional.css :

.toplinks {
    background: none repeat scroll 0 0 #000000;
    color: #FFFFFF;
    font: 11px Arial,Tahoma,Calibri,Verdana,Geneva,sans-serif;
    position: relative;
    right: 20px;
    text-align: right;
    top: -140px;
}

Those fixes are not ideal and are just a patch up , you should get the theme done correctly as it looks extremely poorly made with CSS values which shouldnt really be there.

But the above should fix it for now at least