this is unfortunate, we do have an inconsistency there and the wording isn’t super clear either. The diagram at 4.8.3 should say 45cm instead of 60cm from the border of the playing area, so 45cm+12cm=57cm from the back wall. We will update the diagram but it will probably not be this year because of the holidays.
The thinking behind the change was to make it less likely for goals to be scored by driving straight at the ball that was placed on the neutral spot and to maintain roughly the same distance to the enlarged penalty area.
Thank you for pointing this out.