yup, muscle is the one thing it can't take into account, and muscle means you need even more food. how funny that site said that. If you google 'calorie counter' you might get a mixed review. Even ones that say they follow the same process are a little off depending upon

consider trying to eat a heavier evening meal before you work out, and a light "snack" type thing when you get home, or make sure you eat foods your body will take less time processing. Even fix the dinner for the next evening's night, if you want to do fixings...

ok, here's a wierd question, Are you constipated? If you are, that means your food is in the system longer, and your body is sucking calories out of it all the while. You don't want to be the opposite, but a healthy bowel movement is helpful, and perhaps even essential. I think one of the sites mentioned it. Also to consider is if you have intestinal parasites. Most people do, unless they regularly detox for them. they're incredibly easy to pick up. any restraurant or place with processed foods, if one worker did a quick wash, or didn't wash, if some bird left a gift on a fruit you ate, and you didn't clean it up thoroughly....

of course, if you don't have to worry about it in the summer, you'll probably drop them then anyway , so in the end, you'll win!