You are right! Many other things factor in to weight loss besides caloric intake. That is why we have weeks of doing everything right and gaining and weeks of overeating and losing. Things like genetics, metabolism, kinds of foods we eat and more all factor in to daily/weekly weight loss. For woman, hormones can make us gain each month. That is why consistency is so important. There is no one answer and you have to find what works for you. Plus, our bodies are made up of 60% water, so many factors can cause our weight to shift hourly (sodium, sore muscles from exercise, stress, etc.). You just have to be proactive and find out all the nutritional and fitness information you can and apply what works for you. Good luck!