I believe that Roulette is one of the easiest of the computerized games to manipulate, along with Keno & Slots. I don't usually play Roulette because of this very reason. I've experienced similar results at other online casinos, and wonder myself if it is being manipulated. Do you notice different results when you bet more or less per spin? I've seen that happen before. Been on a hot streak when I'm betting $1-2/hand, then I up the stakes and go cold, reduce them again and its hot again. Maybe coincidence, maybe not.