You have to get at least 10 minutes of continuous activity for it to register an exercise "event" on your tracker. So you are correct that if you walk for a few minutes, stop for a few, then walk for a few more, that won't register as a workout.
"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."