The drop-down for the Title field in Employees > General > Details contains all the titles that you have entered or used previously. Those titles populate the drop-down list. If you want to add a new title, just type it manually. If you want to update any of the existing titles for employees, check out this article: Change employee titles.
The Department drop-down in the Employees > General > Details screen is an auto-populating list. When you type in a department name for an employee and save the details, BQE CORE adds it to the existing list. So, whenever you open the Department drop-down for an employee, you can select from the ones entered previously or add new ones.