Same problem- runtime seems to be stuck at where i set it on the install- 6hrs
the cron command is shows full unix command line:
*/20 * * * * /home/mysite/public_html/wp-content/plugins/wp-o-matic/cron.php?code=
so to add via a cpanel cron job manager just use:
/home/mysite/public_html/wp-content/plugins/wp-o-matic/cron.php?code=