I'd like to know what you're doing to "burn at least 600-1000 calories".
Fit factoid: Average calories burned running a marathon: 2,624.
You would have to be running the equivalent of a half marathon every day to be burning 1000 calories.
As another poster pointed out, it appears you are over estimating.
That aside, what works in mathematics doesn't apply evenly to weight loss.
There's just too many check and balances and different systems in the body that don't know the first thing about math.
For an explanation why this is, try Googling something like "whoosh effect weight loss".
Here's one link that gives an explanation Lyle McDonald wrote on the subject -
Essentially what he's *theorizing* is that fat cells fill with water for a period and then your body releases that water ("whoosh??") at a point and you see a decrease on the scale.
Not too sciencey, but seems to to be an explanation of what happens in real life.
