Take those calorie burn things with a grain of salt, they are way over simplified and dont really mean much. You can calculate your base metabolical rate with online calculators which take your exercise etc into account and that will give you a rough calorie amount that you can aim for each day for maintenance. Then you just need to adjust down or up a few 100 calories depending on if you want to gain or lose weight. Thats obviously a simple way to look at things but it will be significantly more accurate than a calorie burn function on a pedometer