Hello 
I'm the author of CertSage.
The cron job writes within the platform/os aren't always reliable. Not intentional. Limitation of the underlying software. Sorry about that. Each copy of CertSage actually checks for renewal of the certificate in its CertSage data directory every time its certsage.php is loaded by any means. The cron jobs are simply there to ensure that certsage.php is loaded once per day. Once a cron job is created the first time a certificate is installed into cPanel using one of the buttons in CertSage (when autorenew.txt is created), CertSage does not manage that cron job after that point. Feel free to add/remove/manage the cron jobs however you see fit.
This might help for the rest: