Question about the "job organiser"

[c-r-o-n-o-s]

Hello.

I still have problems understanding the "Job Manager".
The arrow keys to move the priority have no effect on me.
Regardless of whether the current job is paused or not, I cannot move the "underlying" job forward.

Example:
A calculation that I start and then put in the background ends up under "Jobs".
Now I can open another project and work in it.
All changes (even just assigning new photos) now also end up in the job manager as a subordinate job.

Unfortunately, I can't change the order there with the arrows.
Even if I pause the first job, I can't get the subordinate job up or started.

Is this the right way?
It would be more flexible if I could briefly interrupt the "long two-day" job to do short calculations on the next one.