The Repeating Scheduled Jobs queue is only applicable for jobs that have repeating options specified under the Schedule tab's Advanced Options. To learn more about these advanced options please refer to the Schedule tab in Adding or Editing a Scheduled Job.
After a scheduled job first executes, the repeating options are evaluated to determine whether the job should schedule itself to repeat. If the job should repeat it will be placed into the Repeating Scheduled Jobs queue.
If the job is currently repeating, disabling the scheduled job will not end its repeating jobs. You can stop a repeating job from rescheduling itself by canceling the job that is next in the queue.