For those with Bodymedia's

I just got my Link today. And I have a few questions. When I set it up before even wearing it, it showed a 2000 calorie burn. Why is this? Is this because of what it guessed my BMR at from initial algorithms?

Also, I did 30 Day Shred with it on and it counted it as moderate activity which is fine, according to BMF macros I am to do 60 minutes of moderate activity a day and 30 minutes of vigorous activity. But if Shred is moderate, what the heck am I gona need to do for vigorous????