Project and Cost Codes for Purchase invoices are managed separately in the Inbox and single invoice view.
The label displayed for Projects in your drop-down menu shows the Project Name as it appears in Sage, rather than the numerical code. If the Project does not have a name, this will default to the code.
Related guides
A full guide on integrating your company with Sage 50 UK&I can be found here.
If you have added new Project codes to Sage and need to pull them through to AutoEntry, you will need to re-sync your company's data by following these steps.