All bets are sure bets after You win Them , its Just a matter of saying , Please don't post off Topic here.
You are using in a matter of saying, but there is a meaning for "sure bets" in the betting world, and they are 100% sure because you use different odds from bookies so that you manage to bet on all possible outcomes and still win from it, just like trading, but it's even better because you don't have to wait for the odds to change, because the difference is already available.
Anyway I wish you good luck, and hope that your bets really become sure bets in the end xD
Also I think you should consider entering in our competition, sponsored by directbet.
You just need to bet as you already do, and you will have a chance to win prizes in the end, on top o your normal winnings, so it's great added value to your bets. We even have daily prizes of 30mBTC this time, so check it out, I really think you will like it.
Here is the registration link:
https://bitcointalk.org/index.php?topic=1248467.0Good luck!