The Definitive Guide to Data Quality
I've had the same problem with TOS myself and here's how I fixed it.
Copy 'myjob.item' and 'myjob.properties' (found in the 'process' folder) of the job you wish to copy to the process dir of the job you wish to have them in and reboot talend. Of course, do not save over these jobs. After the reboot the jobs are listed in the project.