There are actually 3 seeds. Server, client and private/secret seed.
nvm, don't want to get into this conversation about seeds. I'm a developer and I find it waste of time talking about such stuff with people who don't understand code, no offense. Was just pointing out that flagging users for this specific matter isn't the best way to act.
Peace
Don't know on which sites you bet, but those sites I've been to only use a client seed and a server seed.
I never had problems verifying my bets with only those two seeds either.
You seem not to understand things, not mexxer-2 and me, but hey you're a "developer".