You cannot enter a "TEAM" into a staffing profile as forecasted/unmet demand. You have to choose a role/position. This is not conducive to moving to a Team structure, as you're not requesting a role within the team on a project, you're requesting the entire team (which could be made up of Business Analysts, Developers & QA).
In order to work around this we have created positions/roles as the team name, with the same team cost rule associated so that the costs are forecasted correctly prior to a team being allocated to them.
When a team is forecasted, the costs should come from the cost rule set up at the team level in team management.