The only problem is, that the weight that they ask you is not your lean body mass. What they are telling you there is what you need to keep what you've got now. I work 10 hour days 4x a week as a butcher, and on those days I get about 1 hour of cycling in. It told me that I need to intake over 5600 calories on those days. If that were true I would weigh 30 lbs lighter than I do now.
If you can get your Body Mass Index(BMI) taken. It will show you the % body fat that you have, then you should use the calculator based on that weight when you have taken off the body fat from your total weight. Also remember that these are your absolute maximum needs.