Y'know, I just thought about it; as far as I know, Super Saiyan 2 strictly being a 100x multiplier is never actually officially stated. We, as a fandom, have extrapolated it from various sources stating Super Saiyan 2 is twice as powerful as Super Saiyan, but we've always assumed it to mean twice as powerful as the baseline 50x multiplier. Third Grade Super Saiyan can still be 10x the original Super Saiyan form, and Super Saiyan 2 can still surpass Super Saiyan "in every aspect" by 2x, making it a 1,000x multiplier. Nothing actually explicitly contradicts this.