I think it’s a problem of the Envato new payment system.
When you are not located in USA, Canada or Australia you can’t find fields for fill in for normal US accounts (like Routing Number and Account Number). SWIFT and BIC you need only for outside US payments. Try to change Bank Account Country to your local country. I don’t think anything will change. All fields that were on your page will remain. Although the settings for sending money locally to an American account are different from sending it to an international bank.
I think the problem is that the system shows the fields for filling in the local bank, and when switching to a bank in the USA, the fields remain as for the local bank, and not for the American one.
I have absolutely same problem, but with other fields due another country location from you.
My problem is described in detail here. I asked support, but still (4 days) have not received an answer.