Not sure, to be honest but you do have an input tag in there that is not needed. So, you end up with an input that is enclosed in a link which might produce strange results, particularly as the <input> isn't in a form.
Code:
<a href="http://countrycookieconnection.com/store/index.php?main_page=index&action=buy_now&products_id=49">
<input type="image" src="includes/templates/theme183/buttons/english/button_in_cart.gif" alt="Add to Cart" title=" Add to Cart " style="margin:10px;" /></a>
Which could be:
Code:
<a href="http://countrycookieconnection.com/store/index.php?main_page=index&action=buy_now&products_id=49">
<img src="includes/templates/theme183/buttons/english/button_in_cart.gif" alt="Add to Cart" title=" Add to Cart " style="margin:10px;" /></a>
Try that and see what occurs...