No. Available positions provide flexibility; the cooking guide determines the permitted multi-level load. Crowding every level can restrict circulation.
What the observation means
Deep dishes need more space than shallow trays, and several large loads can change cooking conditions. A fan does not remove the need for the recommended arrangement.
A useful next step
Use the tall oven's own loading chart and compatible accessories. Describe how many levels were occupied when results changed. Do not add makeshift spacers or remove protective components to fit more cookware. A repeated problem with the approved arrangement is useful evidence for a cavity-specific assessment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.