私がPaiPalで支払いをしようとしたら、貴方のemail addresは、PayPalに登録されていないので、支払いを実行できない、と表示されました。不思議ですね。面倒なので、最初のインボイスのとおり支払います。
I was about to make my payment to you via PayPal, but I was notified that I would not be able to proceed with the payment as your email address is not registered on PayPal. This surely is strange. Anyway, it seems troublesome, so I will make the payment based on the first invoice.