This has been confirmed and duplicated, even though I'm setting these BMM10 polls for a 1 day lifespan, I can vote on games as early as the first one on The Zeitgeist's account. Not sure what sort of a fix is needed, for now I'm watching the games as they end anyway but particularly on extremely close games such as today's it's rather important.
Not sure why this is happening. I've just updated the forum a few days ago, so it may have fixed new polls. I'll do a test.