Versions:

• Minecraft Forge:forge-1.12.2-14.23.3.2673-installer-win
• Geolosys:Geolosys-1.12.2-1.8.10c
• JourneyMap (optional):journeymap-1.12.2-5.6.0b2

What happens:

Default config for coal is
"coalMinY": 8,
"coalMaxY": 78,

but the field manual shows the coal page as

What should happen:

The field manual should adjust those figures based on the config values.

This is just how the manual works. That’s why it starts by saying “this is assuming default config a”.

Coming up with a dynamic book would be quite a lot, so I don’t expect it happening.

Ok, I get that that might be difficult, but what I was pointing out was that those are the default settings in your config, and they don't match the default numbers in your book.......

Oh! Yeah, I’ve already updated that text. It’ll be in the next release :)