Targets are instructions to the control system, not always measurements of achieved conditions. A correct selection does not show that the appliance can currently deliver it.
What the observation tells you
Door closure, airflow, loading and faults can affect the actual result. A panel that always returns to the target may therefore appear reassuring while food warms. The two compartments should not be judged from one selected value.
A useful next step
Keep the targets documented and obtain appropriate temperature observations from each space. Report the difference between selection and result rather than changing both settings repeatedly to force the display to look colder.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.