It is easy to sort out the issue of the EIR engagement status.
To resolve this issue:
Click Workers and then click Worker Search.
Search for the Worker and then click Maintain.
On the Details 4 tab, press the Ctrl+M to enter modify mode.
Use the EIR Engagement Status drop-down and select the most relevant option for the worker.
Click Exit.
Then to re-consolidate the report:
Click Workers and then click Suppliers.
Click EIR Initialisation.
Select the Apply Contractor Engagement Status check box.
Click Refresh Existing Data and then click Proceed.
Run the EIR report again and the records in question that were originally blank should now have a value.