Addon Authors who have their Addons already listed in the new extend section should have a close look at list of their addons:
There are addons which exist in different versions and still have single addon pages for each version, not making use of the version history feature of the new extend section.
So please look into your dashboard and merge those different addon versions into one addon page, using the version history, and delete the old versions in the system.
For some addons this has been already done by the incredible guys dwilkinsjr and jaywilliams but not for all of them. Go and help them!