Edgar Schein believed that anchors are relatively stable and are formed through real-world work experience. However, major life events (such as starting a family or a shift in values) can sometimes bring the "Lifestyle" anchor to the forefront, either temporarily or permanently.
No, all anchors are equally valid. What matters is the alignment between your anchor and your current job. Issues only arise when your work environment conflicts with your core values (e.g., seeking autonomy in a highly controlled corporate structure).
Typically, the test identifies one or two dominant orientations. If you score high in many categories, it may suggest that your professional identity is still evolving or that you are currently in a period of transition.