Bottom line question: does the lower oven broiler heat when the selector switch is set to Broil? If it does, the oven is operating properly and, as I explained above, top heat is not needed in the shorter oven during bake for top browning. My 1954 Frigidaire is the same way. The tall master oven uses top heat during bake, but the shorter companion oven does not. The manufacturers knew what they were doing.