Not certain why twins exist, except that they do... probably a hiccup in the coding or something. As for why there are occasionally streaks... no random number generation process is perfect, and some are prone to... well, sucking. :P I don`t know what random number generator Stephen used to create the game, but it is probably a low end one that is prone to the "streaks" you refer to. I cannot give you a more accurate answer without seeing the code for GC... and Stephen doesn`t read the help center, so you`re out of luck. ^^;