Create New Case-HR Service Dropdown List Not Displaying All Services

I am impersonating an agent and am creating a new HR case using the path HR Case Management -> Create New Case. When the form comes up, I select a subject person that this agent regularly services. When I go to select the HR Service from the drop down, not all of the choices are visible that both the subject person as well as the agent have access to. However, when I select the COE that this service is assigned to, it will appear in the HR Service list. What do I need to change to make all services visible without having to select the COE?

Thank you!