Ben,
Yes we are syncing with QuickBooks Desktop.
No I have not been able to recreate the problem.
We created the invoice originally in Method. We modify invoices only in Quickbooks. This invoice was created and then the discount line was added at a later time.
The quantity is not input for the discount item; just the amount.
I have tried to find some other examples, but it is not easy to find since the Invoice Total Amount is correct. so it would mean visually comparing invoices between Method and Quickbooks.
Maybe we should hold off spinning your wheels unless I come up with another example.
Stuart