problem with woocommerce checkout manager

hi,
i’ve a problem with enfold + wc + wc checkout manager : in the checkout page, the part relative to checkout manager is broken ( in particular the flagbox relative to create a new account and the space between the additional informations fields).

also the additional fields in the last page you see after complete the checkout page, containing the informations inserted by the customer, are broken

the site in question is http://www.piemontigiocattoli.com

i’ve try to add:

.woocommerce-checkout .woocommerce h2 {
clear: both;
margin: 10px 0;
}

as you suggest to another user in the quick css, with no luck.

regards,

Nick