When moving a policy ranking and then previewing the change there are some policy changes suggested that will happen to unexpected endpoints that might be unrelated to the policy change.
CBC sensor endpoints that have an "out of sync" policy status (grayed out) will show up in the preview pane when moving policy rankings. This can be used to correct those machines and get them back in sync by automatically updating their policy.
This is expected behavior and the "out of sync" policy sensors can either be manually by moving their policy, or can be automatically moved as part of the policy ranking change.