@Kevinp1983, I don't think there's any other way to correct calories burned. The only thing we can do is input our correct information for our BMR. Note from Fitbit site:
Your basal metabolic rate (BMR) is the rate at which you burn calories at rest just to maintain vital body functions like breathing, heartbeat, and brain activity. Your BMR usually accounts for at least half of the calories you burn in a day and is estimated based on the physical data you entered when you set up your account: gender, age, height, and weight.
I use the stationary bike and noticed that my heart rate is way off. The stationary bike shows my heart rate at 90 bpm and my blaze is showing 69 bpm. When I'm on the bike for about 20 minutes the blaze will show my heart rate at 119 bpm and the stationary bike will be at 120 bpm. I'm not sure why it takes the blaze a while to match the stationary bike. Not sure which device is correct. I think the heart rate has a lot to do with calories burned. So if its not registering the correct heart rate our calories burned will be incorrect.