That's crazy. I see where the problem is. The fans are always rotating in a clockwise fashion, no matter which side you are on. On the left, the first fan that hits comes from over her head downwards in front of her and hits earlier. On the the right, the first fan that hits comes from under her in an upwards motion and hits later, making it more plus. The fans should be rotating around Kitana relative to which way she is facing and they don't.
Been known for a while now that Edenian Razors has issues depending on what side you’re on. Comboing into Edenian Razors from the right side whiffs entirely on certain characters and IIRC, it whiffs on Cetrion regardless of which side. Inconsistent is an understatement.
The damage on it also depends on how fast the fans it. If they hit all at once, it does absurd damage but if it hits one at a time, the damage is normalized.