The way that the user guide is linking to the VNF Requirements document is messing with the structure of the VNF Requirements.
https://onap.readthedocs.io/en/latest/guides/onap-user/design/pre-onboarding/index.html#validate-xnf-package-vnf-pnf

Because of the way it is linking, it is setting the source of truth to be in the user guide and not the VNF requirements so it messes up the navigation. (VNF Requirements skipping CH 5/7)