I’m not familiar with the JobOperSearchSvc combo, but if you copy down all the Properties values in Reusable Combo and Advanced, then re-create your combo typing in the Type (instead of selecting from the dropdown, which automatically sets the default sub type and disables all the fields) … then you can play with the fields to try to get what you want
Now that I’m looking again, maybe just working in the Columns menu under Advanced can get you where you want to be… play around there to see what you can get to show
Edit: looks like Retrieve Columns is the field that makes the difference: