1). Vocabulary Definition Wizard has no option to select the schema from the assembly. Only files XSD schemas are supported. Thus, if you forget to append the assembly name to the schema selected from "XML Document Element or Attribute" page - "Document type", you have no parameters to pass to "Call Rules" shape within the orchestration.
2). Only one of the published policies may (logically) be active. However, it is possible to deploy more that one version of the same(!) policies. Why?