While consistency between items is pretty good on Toto (better than most), the numbers shown are 'nominal', meaning it could be a little more, or a little less.
You would want to ensure when attaching the tank that you got it sitting straight up, and not tilted back at all.
You CAN slide the toilet slightly forward on the flange, so IF your wall is actually plumb (not tilted in towards the room), it should work.
Terry can probably confirm, as he's installed hundreds of them...my personal experience is much more limited.
Make sure you're measuring from the wall, and not the baseboard, and to the center of the drain. You may not want to remove the existing toilet, and the bolts may or may not be exactly centered on the drain, but usually are pretty close.
Some toilet flanges have both notches, and slots. If it was installed such that the toilet is attached with the notches, you can' slide it forward, but if it's from the slots, with the combination of the hole in the toilet and the slots, you can mount it slightly off center.