Wendy,
Part of the process of journizing is to reflect on past notes. Since these are solely for the benefit of the instructor, over time, it's very reasonable to expect that adjustments or modifications in the methodology, content, or style may be made in the notations as time progresses. That's one aspect of looking back to view what was deemed important may not seem as important. Usually, over weeks, months, or years, instructors will experience growth, improvement, and higher achievements as an effective instructor, in part through their self analysis by someone who knows them well - themselves!
Barry Westling