15:30 Oct 1, 2011 

that's why I think two legged tie sounds wrong in a league, it's for points not aggregate scores. Anyway, doesn't matter; I am off to watch Man Utd on the telly!

14:44 Oct 1, 2011 

In sport (particularly association football), a two-legged tie is a contest between two teams which comprises two matches or legs, with each team as the home team in one leg. The winning team is usually determined by aggregate score, the sum of the scores of the two legs. For example, if the scores of the two legs are:

First leg: Team A 4–1 Team B
Second leg: Team A 1–2 Team B

then the aggregate score will be Team A 5–3 Team B, meaning team A wins the tie. In some competitions, a tie is considered to be drawn if each team wins one leg, regardless of the aggregate score. Two-legged ties can be used in knockout cup competitions and playoffs. - Wiki
NB: In a League competition with lots of teams it simply means there are two matches during a season, home and away, between all of the teams.
So, your answer is not wrong if that is the case. ;-)

14:30 Oct 1, 2011 

I like the sound of two-legged tie, but can you have this in a "campeonato", a league? surely this is for cup, sudden death matches. Just asking!