I have my own experience as well, psqbo.
Once the invoice is paid, the A/R entries will no longer show. In your case, it seems like the customer has credits and it has been automatically applied to the invoice. When you turn on the Automatically apply credits feature, the available customer credits will be automatically applied to any open invoices.
Let's check if the feature is turned on. This can be the reason why the invoices are showing as paid. Here's how:
- Click the Gear icon.
- Choose Account and Settings.
- Go to the Advanced tab.
- Click the Pencil icon in the Automation row.
- Verify if the Automatically apply credits box is checked.
You can always get back to me if you have other questions regarding this matter.