I assume you all are adding your BMR to your cardio to come up with your daily burn numbers. I am an avid elliptical user, and in the past I have done two hours straight on it. The fact is the elliptical can burn around 500 calories an hour if you go intense, so that's 1000 calories in two hours. That is a **** of a burn. But the numbers I am seeing on this thread don't add up. If you did the elliptical for 2 hours a day=1000 calories burned, PLUS your basic functions, which for me is around 1400 calories a day, that's 2400 calories. So, if that's the formula you are using, then that makes sense.
However, my recommendation is not to use your BMR at all. 1500 calories a day is a reasonable amount if you are trying to lose weight. If you do the elliptical for 2 hours during that day, you will burn an additional 1000 calories, putting you in a steep deficit. You should be losing a couple of pounds a week. If you're not, I would recommend adjusting your carb intake (eating more protein, less carbs) and cutting your cardio to one hour and adding strength training for the other 30 min- 1 hour. You may have hit a plateau. Change it up a bit.