Next year I was department head and I always treated the staff with respect and worked respectfully to resolve questions or find out the answer and get back to them.
As a director of a daycare, I would use conflict mediation to solve problems between two coworkers. Conflict mediation consists of seven steps outlined in Management of Child Development by Hearron and Hilebrand (pg160-161). The step given are: 1) acknowledgement there is a problem, 2) listen to both sides, 3) restate each point of view for clarity, 4) brainstorm ways to resolve issue(s), 5) help parties to come to a consensus about solution, 6) acknowledge how each worked to solve problem, 7) follow up to see if solution is being followed, (Hearron & Hilebrand pg. 160-161).
As a director I would also stand-up for correct policy or check to see to have it corrected so both parties would know how to