Cloudflare and DNSOMATIC

Hello, looking for guidance / support.

I have my domain (call it abcd.com) managed through cloudflare setup as follows:

A             @                My WAN IP

CNAME  subsite1       abcd.com

CNAME subsite2        abcd.com

Now when I configure DNSOMATIC to update my A record, I keep getting an error saying 'record' not found when I set hostname as abcd.com and domain as abcd.com.

Any ideas as to how I can get DNSOMATIC  to update my A record through DNSOMATIC without needing to setup multiple A records for each subsite.

Thanks