Based on what I see in the recipe viewer, all tiers of charcoal work except for the very first one of going from 9 Charcoal to Single Compressed.

Let me know if you don't have this issue, and I'll check if it's a mod conflict.

For me the actually additions / thermal foundation / forestry mods all add a "block of charcoal" which is the same recipe (9 charcoal), I guess I need a config file tweak or crafttweaker to fix ...

I don't have this issue, I can't think of a mod that would cause this.

Just to let you guys know, coal is already compressible in vanilla minecraft. 9 coal = block of coal. I was also confused by the lack of a single compressed coal in the recipes section when I first started use this mod, but all ores are already compressible in vanilla minecraft.