An employee who works part-time is entitled to vacation at the same time as vacation at the main place of work. Since part-time work is a separate employment contract, vacation is issued by a separate order and can be used in parts.
No, police cannot issue a report for drunk driving without confirming the fact of intoxication (for example, based on the results of a breathalyzer test or a doctor's examination).
The fairness of punishing a serviceman for failing to follow an order is a complex legal issue that depends on the circumstances of the case, not on subjective opinion.