You can't always go with what the scale shows day to day. For example if you eat more calories and therefore probably more volume/wight of food one day and weigh yourself the next morning before having a BM, you'll probably weigh more due to more bowel content volume and weight. You really can only correlate calorie consumption and weight over a more lengthly period of time. Keep up with fitday for a month, then look at your average calorie intake report over that time period and have a look at what your weight has done. Also don't forget to measure your body !!