but the fourth one does not.
This happens sometimes. I've no idea why. It always gets sorted out in the end. Very rarely it can take up to a week but usually it will fix itself in a day or two.
When I ran my daily check of outstanding bets this morning, I found 3 satoshidice bets that hadn't been processed yet:
0a91ddce746c95e50723906ed934b2fb4bcc5aaf2dd10784055bd4d5715f2e7e
302b89627efdb6a96a00cf6736a753a1864ed7e991d73376a4dcb4fd55660cb0
c5026931c5ff513f3ee60a981585e24f1d9a2df8809f7120ffe2bf6f6b238581
The 3rd one is yours. The first 2 are both almost a month old, and are both 0.01 BTC bets by the Deepbit pool address, 1VayNert. So you're pretty much unique at the moment in having a stuck bet.
What sucks is that to determine whether you win or loss they will use the daily secret of the day they process your bet, not the day you sent it. So they could in theory ignore your bet until the secret of the day makes you lose.