The bet page said that funds were received in time. It said: "Sent 5.384 BTC from 1QDRDaVZ2oXfXXWbkf98ebcfT9y2x8LZHN" 2 hours before the match. I checked.
The date on the blockchain.info site is wrong... But i understand the problem. Still have no confirmation for this transaction! So you need 1 confirmation before match starts?
So better pay a small fee next time one bets on your site, right?
This was an unusual situation. The BTC did come through before the match, but then there was no record of the transaction on the blockchain and no confirmation until 12+ hours later (still no confirmation yet). This would be an easy way to cheat, though I do not believe you were trying to do so. It was probably an error with your wallet software or delay from an online wallet.
As long as the bet enters the blockchain before the match you will be fine in the future.
Cheers