I figured out that extra code is added each time we do an export import.
E.g., we had PVM5PVM5PVM100 in the VAT codes, after an export-import we have PVM5PVM5PVM5PVM100.
The register for Order Classes is common for Sales orders and Service orders. When I set an Order Class to create an Activity - it works for Sales Order, while for Service Orders - not. Is any setting...