Like i said before, the dynamic attribute line shows because of the text area, it is not really a probelm and can be ignored.
the add to cart button behavior does not show because the addf to cart code has the following line duplicated:
$ATC_RedirectAfter = "../../cart.php";
$ATC_RedirectAfter = "../../cart.php";
it should be:
$ATC_RedirectAfter = "../../cart.php";
$ATC_RedirectIfIn = "../../cart.php";