Hello,
1) Add the below code to Theme Options > Custom CSS
.product-content .et-single-buy-now.single_add_to_cart_button.button, .et_product-block .et-single-buy-now.single_add_to_cart_button.button {
max-width: 108px;
}
2) Provide us with correct WP Dashboard and FTP access and we’ll check the issue with the wishlist in more detail.
Regards