Per the Framework team:
There are two primary reasons for historical closed orders being considered to have an outstanding balance. The first is fraction of cent differences in balance between different systems and how they calculate taxes.
Another is due to interactions between systems where tax rates changed between the initial order and shipment. These don’t have customer facing impact in terms of payment due, but require handling from an accounting perspective which is why your historic or cancelled order might have been included in the list of orders affected.
Again, we take your personal information privacy very seriously and we apologize for the inconvenience or alarm this incident might have caused you.