Yes, it is possible to have 2 simultaneous games.
http://www.chess.com/blog/CaptainPike/create-team-match
Are you an Admin? Do you set up team matches? Can you? If so, you may want to take a look at my tutorial which explains everything.
And it's not "nonsensical or stupid" when dealing with members who may wish to keep their number of games down (as all higher-rated players do and many busy members do).
It is possible to have two or more simultaneous games or perhaps no simultaneous games but it is not possible to have one simultaneous game. The term "1 simultaneous games" used by chess.com to describe online team matches in which participants play one game at a time is nonsensical and stupid.