Apparently Manager is not any more in the Ubuntu app store. Bloke at Full Circle magazine say this is due to not been upgraded.
For commercial PPA uploaders, publishing on Ubuntu Software Center is very slow process. I gave up. I wouldn’t mind if Canonical would charge commercial uploaders an annual fee and treat them better. As it stands now, Canonical is doing reviews of commercial software submissions for free which means they don’t have enough resources to handle these submissions in timely manner.