Many people gain weight while trying to quit, one of the reasons is substituting food for smoking. It makes perfect sense why we all do it - to satisfy the hand to mouth motion of smoking, and well, frankly, to give us something to do during the time that we used to go outside and smoke. Try your best not to fill that void with food, or at least, not bad food.
The effect of smoking on metabolism is minimal at best, so don't be over worried that your metabolism is slowing down from not smoking.
You are off to a good start with the exercising. As for the weight gain, if you are gaining odd ball amounts pretty quickly, my first look would be sodium. You might be prone to water retention, like myself. I wasn't when I was younger, but got that way around my early 20s. I have to be very careful with sodium intake or I will gain pounds overnight in water weight. Make sure you watch the salt intake (watch out for canned soups, frozen foods - even Lean Cuisine, and check labels for sodium content) and keep your water intake up.
After looking at your FitDay -
*be careful with the hot dogs and canned soups
*granola isn't always as healthy as it's cracked up to be and it's pretty high in fat
*look at the pie chart -
try to aim more for around 40% carbs/ 30% protein / 30% fat (mostly good fats) - the majority of your calories (which are pretty high) were from carbs - I am not a fan of Atkins, etc however, keeping carbohydrate intake to under 50% can help a lot (try to get your complex carbs from whole grains, brown rice, sweet potatoes) and the rest of them from fruits/veggies
*your caloric intake is pretty high for your weight, but I don't know your height/age/sex so I can't say for sure what it should be, and you are active, but 2200 is on the high side. Just guessing, I would put you around 1500 a day or so, but would need more info to get a more accurate number.