I’m showing both the www subdomain and the apex domain (aceanalytical.com) working for the Netlify site when I test now.
Why didn’t it work before? My best guess is that the previous records were being cached due to time to live (TTL) values in the DNS records themselves:
The only solution for this is usually to wait for the TTL to expire. There is more information about minimizing the impact of TTL values when making DNS changes here:
Please let us know if there are other questions and/or if it still doesn’t work for you when you test.