Where did I say that ?
As soon as I noticed the Asus router pushing its own DNS server whatever setting I applied, I switched to the Pi-Hole provided DHCP service.
And that is what me and @gmrza trying to tell you to do as well.
Running it the way you have now is, for example, not giving you accurate stats on the web GUI.
About half of the queries will come from your router and the others from your clients.