Thanks for sending over the details. When you have a bank tagging rule setup it will always create a new invoice and link the payment on the bank to that invoice. You can’t have the system link the new payment to an existing invoice using a rule, because the software can’t know which invoice to link to.
In such cases you should remove the rule and manually tag the payment on the bank to the existing invoice. You could also change the rule and uncheck the box “Attach to invoice”, this will then drop the funds on to the client account so your can manually link it to the invoice.
Hope that helps!