Only time for Q1, 'cf' and you have virtually answered yourself!
Flaps up and airborne the ram door SHOULD be closed. If it is open the blue light indicates an 'abnormal' condition. Sometimes excessive work for a pack can cause this (demanding more cooling airflow) , sometimes modulating system failure. Not a crisis, but I have had 2 (L & R) lites on once followed fairly quickly by double pack failure, so it is worth an 'NB'!