Wasn't me. Open Invoices and Open Balance are separate views. And I am fairly certain that desktop and online work the same. Any invoice that is not paid in full is open. Partial payment on an invoice does not change the due date and quick books declares the original invoice as overdue.
I have renters. I charge a late fee. A tenant pays half on the first but has yet to pay balance. Posted rent is overdue but open balance is half.
It may seem backwards or upside down but that is qb.