New Zoho Project instance created when trying to link GApps to existing Zoho Project

New Zoho Project instance created when trying to link GApps to existing Zoho Project

Hello! We just created a Zoho Project Portal and upgraded it to premium. We then tried to link our Google Apps domain to this portal so that we can sync tasks. A Google Apps account already exists in this portal. Unfortunately, following the instructions of add the Zoho Project App via the Google Apps Marketplace, a new instance of Zoho Project Portal free is created. Now when going from the Google Apps, there are two Zoho Project Portal to choose from.

In the premium portal, no Google tasks related links can be found anywhere.

What did we do wrong and how can we rectify it?