Hello,
I do not see the problem on your site, please see screenshot from our demo http://prntscr.com/hb7yvz. You may enable “Redirect to the cart page after successful addition” option in Woocommerce > Products > Display. Also, you may to disable Ajax “Add To Cart” option in Theme Options > Single Product Page.
I would recommend you to change Fixed Header Text Color > Dark in Theme Options > Color Scheme.
Let us know if you need any further assistance.
Regards