My experience on my Laser Cue (a couple years older than Grand Lizard) and Swords of Fury (a couple years newer) is that you don't see the leading one of your score (so a score of 10,007,450 looks like 0,007,450), but the machine recognizes that you've rolled it over, and saves your score in the high score table as 9,999,999. You automatically get #1 no matter what your score is when you roll it over.