When there are two lines for a match, it usually has to do with the Asian Handicap.
There are two types of handicap betting in soccer: the handicap match result, and the Asian Handicap match result.
It basically means that the game is started with the team getting the goal +1 up by one, and the other team has to score more than that to win the bet.
For example, in a recent English Premier League match in March, Fulham hosted Manchester City, and the odds were very high that Manchester City would win the game. City came in at -650 on the money line, while Fulham was +1600l and the draw was +650.
The Asian Handicap for the match was +2, +2.5. That meant that if Fulham lost by more than three goals, you lost you bet. If Fulham lost by exactly two goal, half you stake was returned (+2) but you won the other half (+2.5). Any other result meant that you won the bet.
