Their caloric count is for the patty raw, before cooking. So you'd have to know your raw weight, and raw weight of 151g=200kcal. Not after.
Yes, as you cook food you lose water (no calories) and the food becomes more dense, so the caloric content of the food increases per weight amount. As in, your food shrinks in size and weight, but it contains the same calories per whole unit, so the individual weight units "increase" in caloric content.
It's water and the weight of the extra food still in your system. Some of it may be water in glycogen, so it'll take a bit to deplete. It's rather individual, how long you'll retain water, prolly based a lot on A) what you ate and what your "normal" diet looks like (for instance, big or small difference in something like sodium or potassium) B) your individual reaction to such… et. Like I don't actually take long to drop down, I don't seem to so much retain water as need to get the excess weight of food out of me, but other people will balloon up and take nearly a week to come back down. *shrug*
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