Hi there EXI-plast,
It's vital that all your transactions be entered properly for your books to be well balanced. QuickBooks Desktop is a great tool able to help you keep track of the sales transactions you make so that you can make sure your customer pays you for your services. I can point you in the right direction for assistance in getting this display resolved.
For help in getting these sales orders to not show up when creating invoices, I recommend reaching out to the QuickBooks Desktop support team. They'll be able to view these forms with you as well as your setting in a secure environment to provide troubleshooting steps in order to get the display working correctly. You can reach them using the methods outlined in the QuickBooks Desktop software support policies.
If you have any other questions, feel free to reach out here.