the calorie minimums are for nutrients so that you get enough of them. running four miles [or swimming or any exercise really] doesn't cancel out that so your ranges don't change. www.sparkpeople.com/resource/calorie_calcu
this is how your ranges are calculated. basically the number you entered as your calories burned goal is divided by 7 and that 1/7 is added to your bmr and daily activities before your deficit is subtracted out. so your workouts have already been included to get your ranges. if you're changing your calories burned by more than 70 cals per week [and do pay attention that the burn number at the end of the week is about what your goal is, the minutes don't really matter so much] and your ranges aren't going up by 10 cals what that means is that you have set an overly aggressive goal [in other words it is mathematically impossible to get the nutrients your body needs and still have enough left over to create a large enough deficit that translates to the loss you input] and the program plopped you in the lowest range. when that happens, you have to hit well into the five digits to change your range. figure your loss per week goal should be 1% of your bodyweight or half of that if you are very active or within about 40lbs of your goal.