Hello, @FLOWCFD.
The data populated on Box 9 depends on the EC vat rates. Be sure that the VAT codes on your transaction have this rate. Otherwise, please contact our Online Support so they can check this thoroughly in a secure environment using their tools.
For additional information, you can refer to this VAT code guide: Common VAT Codes.
Keep me posted if you have follow-up questions or concerns. I'm here to help however I can.