Using RBS with resource formats expenditure category/expenditure type and job don't show jobs?

Summary:

We created a resource breakdown structure with resource formats expenditure category/expenditure type and job. When budgeting the job titles don't appear in the LOV. The RBS has the job set populated, and we have added job titles to the resource format Job. Only the values for the resource format expenditure category and expenditure category/expenditure type show in the LOV. Why don't the job titles not appear in the LOV for budget entry?

Content (please ensure you mask any confidential information):

Client needs to budget at expenditure category or expenditure category/expenditure type level for non-labour cost and at job level for labour cost.