If you want to commnicate with me specifically, it is best to use Private Messaging. You do this by clicking on my screen name and choosing "Invite to a Private Topic." Attaching a message to an unrelated thread can go unnoticed. I did send you a PM.
Anyway, I doubt your pouch was intentionally constructed to be horizontal. Most likely, internal scar tissue (adhesions) caused it to heal in this atypical position. Your choices are to wait and see if you adapt to it, or have surgery to repair/reconstruct it. Either way, they would not likely do this until you are months post op, to reduce risks of further complications. Night time leaking is fairly common early in the adaptation phase. I don't think you are doing anything wrong.