The minutes count, but since you don't burn as many calories as you do during the workout, that's why it's not included in the calories burned info. You could manually add the warm up and cool down minutes to your tracker if you'd like.
Hope that helps,
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford
"No matter how slow you go, you are still lapping everybody on the couch."