If a project in an agent host's /etc/project database has the same project ID as a project in the Sun Management Center database but has a different project name, then the project will not be discovered by Container Manager. A unique project ID across all hosts in the same server context is a Container Manager requirement.
You should not use the projadd command to create projects. Use only Container Manager to manage projects.
Workaround: Delete the nondefault project that was created by the projadd command from the agent host's /etc/project database and create the container by using the New Container wizard in Container Manager.