1. Yes you were correct to take passive rest if you were very tired. In general if you are sleepy tired passive rest is the preferred option.
2. Correct
3. If you are sleepy tired or grumpy/impatient choose passive rest.
4. Two weeks between races is optimal for some athletes and performance will be higher in the second event. Some athletes take 3 weeks to recover from a 50 miler and ride like a slug after 2 weeks. This is something to learn and recognize about yourself and use in planning your season race schedule. Use these Tools to Speed Recovery to give yourself the best opportunity of being in the 2 week group.
Lynda