People who are troubled by unwanted repetitive thoughts and actions or both are suffering from: obsessive-compulsive disorder. panic disorder. panic attacks. generalized anxiety disorder.

Obsessive compulsive disorder.  Compulsive behavior means you do or think things persistently and repetitive.

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.