Some grids offer different heights, but only use the positions described by the manufacturer. Changing height changes the food's proximity to the heat.
What the observation means
A grid that is not designed to be inverted may become unstable. Similar-looking accessories from another cooker may not seat correctly.
A useful next step
Check the accessory diagram before loading. Keep the food type, grid position and grill setting together when reporting a changed result. Do not assume a closer position is a safe solution for a grill that seems weak, particularly if it makes food or fat contact hot components.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.