We have configured our landscape and tenants and have have successfully completed our initial pushes but now we no longer have the option to push from Staging to Production.
We can only push from Staging to UAT and then UAT to Production.
This is by design. Basically you design in Staging and push to Production (for go live) after that initial push, you can only push from UAT to Production. This is for insuring that testing is completed and your changes are validated to be working prior to pushing to Production.
If you wish to bypass this UAT step and push directly from Staging to Production (not recommended) you can go to the Landscape Group and check the box for Two Tier Landscape, this will disable the UAT portion of the OpsConsole (not remove, just remove from pushes) and you can then push directly from Staging to Production.