That's not true - this is why there are cronjobs parts - they group tasks that can be scheduled to run together:
http://ez.no/doc/ez_publish/technical_manual/4_0/features/cronjobs/configuring_cronjobs
http://ez.no/doc/ez_publish/technical_manual/4_0/reference/configuration_files/cronjob_ini Hope this helps.
PS. My apologies! I might have misunderstood you... do you mean the exactly same job? twice in one setting for example? What would be the reason for that?