They allow you to have it on 2 computers because (a) it's always been allowed and (b) there are a lot of people who are very wary of sync.
If you use the Backup command to transfer from 1 computer to the other make sure you include the media files and the sync controls. Then sneakernet it from one computer to the other.
If you use the Backup command to transfer from 1 computer to the other make sure you include the media files and the sync controls. Then sneakernet it from one computer to the other.