@Leo Wattenberg, does deleting duplicate videos include deleting unlisted videos, and those in draft form?
@What You Haven't Seen, has there been any update on the status of your channel? Did deleting the drafts of the duplicate videos work? If it did, this could solve the problems of some of the other people, such as Keltuc, below.
@keltuc, depending on the answers of Leo and What You Haven't Seen, we may know what needs to be done. Maybe all the unlisted duplicate videos are what is affecting your channel. Though, I cannot tell if deleting them will fix your status, until @What You Haven't Seen or @Leo Wattenberg have some new information.