the screenshot shows the output of a double click in SM50?
In SM50 you see the current situation - the WP 15 type BTC (background programs) is waiting.
It is started, but idle, waiting for jobs to execute.
The Job Scheduler itself is automatically running in a Dialog WP. If he detects that a job defined in SM36 has to be started he will ask the dispatcher to start the job on a BTC work process in the system.
regards
Peter