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A few fine points:
jb posted he would take the 1 btc bet. on the next page cg posted "all bets confirmed."
Is that a statement that all best are before the post are accepted? or is cg simply stating that he's confirmed the bets he's willing to accept and implying that betting is closed?
After this jb starts insulting cg and demanding that he confirm the bet... which implies that jb was under the impression that without confirmation the bet wasn't on.
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Personally, I chose to read 'all bets confirmed' as the op expressing that he was out of funds to cover bets and that no more would be confirmed... and since he started out posting with a quote of each bet he accepted that only those quoted with a confirmation were valid.
It just goes to show that when you're dealing with money, it's usually in your interests to be as verbose as possible so you avoid misunderstandings.