Welcome to the Community, @Neal S. I'll help clear things up for you about rejected ACH payments in QuickBooks Online (QBO). 

Since you moved the original payment to a new invoice, the failed payment status will transfer to it. We suggest this step to keep your books accurate and allow you to resend the original invoice. 

I suggest you keep this article for the steps to resolve rejected ACH payments: Fix rejected ACH payments or fees in QuickBooks Payments. It includes a table that lists reject codes and what you can do to take care of them. 

Feel free to post a reply in the comments below if you have other questions about online payments in QBO. I'll get back to you as soon as I can. Have a great day!