Hi there,
Have you exported and imported your theme options settings? The italic bug is known issue and should be fixed in next 2.1 version. Though, not of all can reproduce this issue, so there should be something happened on your setup.
For now, as workaround, please add this CSS to your global custom CSS.
body,
.x-navbar .x-nav-wrap .x-nav > li > a,
h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
font-style: normal;
}
About the checkout and Paypal images, please add this CSS as well
.woocommerce-account form .payment_methods label img, .woocommerce-checkout form .payment_methods label img {
display: block;
}
Thanks!