I just bought a new cadco OV-013 over the web from instawares. It has two control knobs and one led light to the right of the temp. knob. All the pictures and all the ones I have seen in restaurant supply stores have two led lights (red and green) between the control knobs. I have written to Cadco asking about this and have not gotten a reply. Instawares says they don't know why. Can anyone answer this for me?