As far as I can see there are some problems with the HTML coding e.g. I guess "lbl_checkout" has some incorrect HTML code in there, what could be the problem.
Also, the heading dive is overlapping the buttons.
You should add something like:
.checkout-buttons {
position: relative;
top: 50px;
}
to skin/common_files/css/main.css script.
Please check the HTML and correct all the errors found ->
http://validator.w3.org/check?uri=http://dimensionalarmada.com/cart.php