Following up to myself here. In the VLAN examples, I don’t show this concept, but made arrangements for it because when doing so I thought it easier, faster to use one ip address in a mangle rule vs accounting for all ip address schemes in use. Anyway, its a concept and thought that is outside of the VLAN articles and that’s why it confusing.
If you really want to redirect DNS queries in your environment, it might make more sense to do what I’ve shown.