I have completed the Amy 5k training plan. It seems way to easy at I don't feel it got me ready for a 5k. I have had to remove a couple of workouts and reschedule my runs because of a busy schedule. As a results all of my runs are either 1 mile or 1.5 miles. I read in the traing program that the longest run should be 4 miles for this plan. Can garmin coaches handle deviation from the workout plan?