running your duplications that way will not kick off each duplication as a separate job like the SLPs would. All the jobIDs are in one duplication job kicked off by the vault job. It will run the duplications sequentially one at a time.
If you looked at the Activity Monitor/Job Details/Job Overview tab right after you kicked it off, you may have only seen the one jobID in the File List when you would expect to see them all. But I have seen that most often the other jobIDs don't show up here until they start duplicating. So if you went back there today, you should see all the jobIDs in that file list box.