Toward Ecosophy

After further thought I can actually think of a reason the return won't seal things even if the leap here did: karma. The returning souls will have karmic ties with us to deal with. If everything is sealed now, they can deal with the karma waiting when they get back;but if everything seals up when they get home, barring another transfer of a large number of souls, they will not be able to deal with karmic ties here.