Hi @LWAY1,
Thank you for a very detailed description of the issue in your post. I'm here to take care of your query and clear things up for you about how QuickBooks Payments works.
Whenever a customer pays an invoice through QuickBooks Payments, QuickBooks Online (QBO) automatically gets updated. The invoice will have its payment recorded. This means that there's no need to record the payment by hand. Since you mentioned that this was the case, this is also the reason for the duplicate transactions. You can take a look at the bottom of the QuickBooks Payments page for a list of FAQs, along with their answers.
What you can do with your online bank feed transactions whenever they appear on your Review tab, is to match them to those payments that were automatically entered in the system. To add or match bank transactions depends on its given situation. See this article for additional details: Categorize and match online bank transactions in QuickBooks Online.
Whenever you encounter any error messages during the reconciliation process, keep this article for reference: Fix issues when you're reconciling accounts in QuickBooks Online. This is a step by step guide that can walk you through in taking care of any issue regarding your bank reconciliation.
Any other concerns I can help with? Place them in the comments below, and I'll be sure to get back to you.
