The job command must be the very first command in the pipeline.
It's not allowed to have more than one such command per pipeline.
Note
Whenever When you delete a pipeline with a job command in it, the according job will be deleted. The same is true in case you remove the job command from the pipeline. In case you rename the pipeline or change parameters of the command, the pipeline job will be replaced by a new one. So make sure to change such a pipeline only in development mode, never in production.