It could be a couple of things but it's quite normal for cuttings to wilt a bit or even drop all their old leaves. It's only been about a week so I'd wait a bit longer before I'd do any type of correction. You probably should have put only two cuttings in each pot. When we do cuttings, we water well right after planting and then water sparingly until new growth appears. Wait another week, you may lose a couple but if some survive that would still be success! Keep us updated on their progress.
Thanks @gjones That's some help. Actually I don't know what to do about this branch at bottom right which is totally drooping. The leaves on bottom half of it look healthy but on top these are pale and lifeless. Confused whether to cut off all, half or tie it up straight and wait.