It seems when "Recursive compacting" is enabled and the Compacter compacts enough material into another material that can be further compacted, it does not do so until there is a block update. The update has to be in an adjacent block, or a state change in the Compacter.

Reproduction

1. In a creative flatland world, place a Compacter with a Creative Energy Cell on top
2. Set the Compacter's redstone mode to "Disabled"
3. Insert 4 stacks of Iron Nuggets
4. Change redstone mode to "Always ON"
5. Observe the outcome,
   • Expected: 4 nuggets, 1 ingot in input; 3 blocks in output
   • Actual: 4 nuggets, 28 ingots in input
6. Place a block against any side of the Compacter
7. Open the Compacter, observe that the 28 ingots have now been compacted to 3 iron blocks

Testing environment

• Forge 1.7.10 10.13.3.1428
• Compacter 0.1.0.4 & BDLib 1.8.2.92
• AutoPackager 1.5.4
• WAILA 1.5.10
• Thermal Suite:
  • CoFH Core 3.0.2-262
  • Thermal Foundation 1.0.0-81
  • Thermal Expansion 4.0.1-182
  • Thermal Dynamics 1.0.0-122

Should be fixed in 0.1.1

Can confirm; thank you! Nice work