The list is being updated daily from Compromised domain lists. Malware and ransom compromised domains. and If you test with an old list the data is probably loaded in the sites and you would get different results. The best way test the same way I did is to grab the file then run this to create the filtered list:
grep -E '^[a-zA-Z0-9-]+\.(com|net)$' compromised_domains_live.txt > domains.txt
I also made a new video just to Re-Test NextDNS with an account and all the blocking / filtering features turned on.