No, your food goal is based on your exercise "goal" not your exercise "tracked".
Spark operates on a weekly average, not a day to day basis. So if you planned to burn 700 calories this week, and you burned nothing yesterdy and 200 today, you'd eat within the same range given both yesterday and today, because your weekly average will still be about right (assuming 3-4 sessions of same intensity).
As Heather said, you can manually set how many calories your goal is for each week, so if you're habitually burning more per week than it says in your goal, go ahead and update the goal so that the food is calculated appropriately.
It may or may not change your range depending on your needs, especially since you're alread on the minimum range.
Deb, in New Zealand