It's good as you win that games but how much do you wager on that odd? The figures you wager determines the amount you win, so can you also share with us how much you wager on the 7.5 odd?
However you winning that big odd is not something new in the gamble world, there are many big odds in the world of gamble and the performance of every players/team determines the odd too. But sometimes it looks like the odds are being manipulated by the odd makers, and that's why they sometimes gives the bigger odds to the team or players that their performance are good and when you did not check their past match and their head to heads you win he able to know the ones that doing well and the ones that's not. That's why most times it's good to check.