HOWTO enable Adblock on Circle?

I have an R6400v2 (Nighthawk AC1750) 

Firmware V1.0.4.82_10.0.57

Circle Parental Control Info

Agent Version: 2.0.8.9
App Database Version: 1.3.1

How do I enable the adblock feature? Is ad blocking part of any Filter Level? 
I have configured myself as a user in Cirlce and my laptop and phone do appear in my device list. I have tried all filter levels, but am still seeing ads on my devices.

What I can do is go to a site e.g. washingtonpost.com and then check my visited history on the circle app and manually block all domains that seem look like analytics or ad services corresponding with the time I loaded the webpage. For the above site, I get:

app-measurement.com

apptentive.com

bizbible.com

cloudflare.com

cookiebot.com

crazyegg.ecom

g2crowd.com

lookbookhq.com

marketo.com

mktoresp.om

and more. 

I can manually block all the URLs until site breaks and then maually un-block sites untl the site loads, but this can't be what Circle had in mind when they say ad blocking is a feature.