How can you tell if a workout is being counted toward your training plan? I completed my first workout under the plan using my Forerunner 910xt but the workout shows up as a normal run below the scheduled workout. Is that normal?
Not too sure what you mean? Once you've past the scheduled date, the workout is no longer scheduled, irrespective of whether or not you actually did. Unless you remove it becomes an unscheduled workout and will appear in the list.
The workouts are not 'counted' to the training plan in anyway. The activity is recorded when you finish the workout and saved to Garmin Connect when you upload it.