Heartbeatz produces two workouts for each activity.

I've just done an indoor walk on my treadmill using heartbeatz and it has recorded 2 activities in apple fitness. One is titled "Heabeatz Workout", the other "Indoor walk". The two are only different in the recording of the total calories. The heartbeatz activity shows the total calories to be the same as the active calories; the other shows different figures. Is this supposed to happen or can I set something so that I only get one activity?