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Could you please confirm that this issue caused by our theme and if you switch to default one it works correctly? It may be a plugin bug or you just some misconfiguration. Please double check it.
And how we can add something to cart on your website? Currently we don’t see any “Add to cart” button.
Thanks for your help. It seems something wrong with my Braintree plugin. After reinstalled, it began working. But I still need help for the layout of the text ‘Credit or Debit Card’. It has the same style as First payment ‘Paypal’. But the text could not vertically centered. The css already set as ‘vertical-align: middle’. However, it works different between these two lable.