| All fruits and vegetable, so it doesnt sound like you consume more calories than necessary.
I'm not familliar with treadmill speed settings (arent they all different?) Do you walk or run on the treadmill? Walking on the job is a plus. Half the calories a person burns in a day is from regular activity. Cardio and exercise are a small boost, but the longer effects of muscle and cardio burn are the prize.
If your diet's good I guess the only thing left to do is to try increasing the cardio. Maybe tossing in some calesthenics. | 
