Thanks I have reported this back for fix asap.
Please add this to Theme Options => Custom CSS to help fix this in the meantime:
.woocommerce-checkout .page-content,
.woocommerce-order-received .page-content {
width: 1170px;
margin-left: auto;
margin-right: auto;
}
For your contact button, you can change this within the plugin Contact Form 7. I cannot see this as you have not provided our login with enough privileges, it should be administrator level.
For the order button, have you translated the WooCommerce plugin also? Ref: https://docs.woocommerce.com/document/woocommerce-localization/
– David.