I would repeat ( for example after two or more hours ) a series of photos with scheduler, the problem is that it always comes back to me
as a "job already completed".
Is not possible?
I assume you are using kstars-bleeding? That's a recent fix, because it was actually a bug. Duplicated scheduler jobs count captures from the same location to determine if they are complete, and the location is given by the sequence file. So when the first job captures N files, the duplicated job sees N already existing files.
In order to achieve what you want, you can create two sequence files with two different locations for your duplicated scheduler jobs. You can also increase the repeat count of the scheduler job by one each time you duplicate that job, so that the second job sees there are additional captures to run.