It may operate a dual-size electric zone or another combined function. The scale should be read from the manual before assuming one section is defective.
What the observation means
An outer ring may need a particular permitted selection, while ordinary low settings control only the inner area. Forcing a knob beyond its designed movement can damage the mechanism.
A useful next step
Identify the zone diagram and normal switching method. Record whether the inner, outer or entire area has changed. Do not dismantle the control or use a guessed over-turn sequence from another cooker. A physically damaged knob needs separate attention from a misunderstood ring setting.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.