Why Power Outgoing all port is too high than Accepted Power in my cavity simulation using CST STUDIO, ?

[Trima]

I have Design Microwave heating Structure, like microwave oven. Consist of material cavity is PEC and there any dielectric material in it. But I found result in tree folder CST STUDIO, The Power Output Out Going all port is too high then Accepted Power. Is it indicate failed in design or is it normal?