The Team tab in the project shows only a few resources but the Task assignment page shows way more resources than what is showing up in the Team tab.
Release: Component: ODPRM
The Team - Staff page had a hidden filter which hides resources with 0% allocations. Configure this hidden allocation filter to the list page and select ALL and filter - this will show all the resources in the team page.
The answer above does apply to all portlet filters and not just the Team page.