I have a Maytag CWG4100, gas wall oven. I am not sure if I'm missing the bottom tray. The bottom has 9 holes (3 along 2 sides) and you can see the flame coming up from the front hole. It is as though there should be another tray over the bottom. Is this normal for this model? Also the broiler, underneath, has a silver plate diagonally resting on the middle gas pipe and down to the tray. Is that normal?