Where specified, advance activation prepares the appliance for the planned fresh-food load. Switching it on only after overloading the cabinet does not reproduce that procedure.
What the observation tells you
The required lead time and cancellation behaviour are model-specific. Some modes stop automatically while others need an action. A lit indicator is not confirmation that every package has frozen through, and it does not increase the permitted batch beyond the stated capacity.
A useful next step
Plan the load using the exact manual and label the food before starting. If you missed the preparation step, do not compensate with an oversized load or repeated setting changes.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.