Burning off calories so you can eat more?!

No, the whole idea of exercise is to improve your fitness level. Exercise just happens to increase your calorie requirements because you are increasing your activity level.

MFP gives you a calorie goal based on your stats and how much you wanted to lose per week...it is not a maintenance goal...it is already a huge deficit from your theoretical maintenance...you are not trying to create a calorie deficit with exercise with MFP. When you set your activity level, it is supposed to be just your day to day stuff with NO exercise...so exercise is an unaccounted for activity which is why you log it and then get those calories back. Be VERY CAREFUL not to overestimate your burn. This is what the math looks like using my numbers...

My MFP maintenance calories with MFP with NO exercise is 2,350 calories. To lose 1 Lb per week MFP gives me a calorie goal of ,1850 calories...500 calorie deficit from my maintenance right (2350 - 500 = 1850)?

So now I decide I need to exercise to ultimately be truly healthy...let's say on average I burn around 400 calories (which is accurate)...this previously unaccounted for activity has increased my calorie requirements and I can eat more but maintain the same deficit. So now I'm eating 1850 + 400 = 2,250 calories. It's still a 500 calorie deficit from my maintenance though...because my new maintenance with exercise would be 2,350 + 400 = 2,750 calories. 2,750 - 2,250 = 500 calories...see...same deficit to lose 1 Lb per week.

There are numerous other benefits to exercise besides weight control...weight control is actually pretty low on that list actually...

Ok i'm confused...

I just did an aerobic work out and burnt off approx. 210 calories, so i put it into myfitnesspal and it now says i can eat another 210 calories.... then of course if i dont, it will say that i'm under calories for the day... but isnt the whole idea of exercise to burn off calories so that i get slimmer and then eat properly to support my changing body... not burn off calories so that i can eat more?! I dunno... seems a little odd

Anyone?!

No the point of exercise should be to improve your health, performance, and body composition. There is already a calorie deficit built into the calories MFP gives you. If you exercise beyond that then you need to eat back those calories to avoid being malnourished. More is not better when it comes to calorie deficit.