How long do you hold those positions on the days when you are not doing the actual stretch series?
Coach makes a note of saying in each of the videos that they are to be done once a week, and if you do more, your progress will be stalled or even regress. I have always been a more is better person, but have exercised extreme self-control is only doing them once a week, and made great progress in 1.5 month. Have you progressed faster/better since adding the extra stretching?