Why would a job that was demanded into CA 7 have a SCHID other than 1? This document describes how SCHIDs are assigned to CA 7 jobs when they are brought in with the DEMAND command.
If you DEMAND a job with no schedule and without the SCHID= keyword on the DEMAND command, the job enters the queue with the default SCHID of 1.
If you DEMAND a job that has a schedule, the SCHID defaults to the first SCHID created for that job.
You can require the use of the SCHID= keyword on the DEMAND command. To do this, use the keyword SCHID=YES on the SCHEDULE statement in the CA 7 Initialization File (pointed to by the UCC7IN DD statement in the CA 7 online procedure).