What are some best practices for creating Inventor drawing templates?

Within my department, we are have a on going debate as to the best way to create Inventor drawing templates. Specifically, the templates that have been created lose their settings. We have assigned one person to create and maintain the templates and the rest of department personnel do not make any alterations to the templates. Inevitably, the templates lose their settings and have to be corrected. Any help and suggestions would be greatly appreciated.