once you are loged in it only say's there are three links visible
| List Players | List Fixtures | Team selection | (personally my design has placed the team selection link within the fixture.... but don't think it has to be 100% same?)
as for the Team selection and what it must do... well to me it is only logical that it must give you the ability to select a team...
from a list of all the players, and allocate it to a specific fixture...
team = subset of all players
every fixture has ability to have a different team selected.
hope that answers your question