During our last build using this mod, we did another large building, which needed placement of torches for lighting. Everything worked great on the block placement, and the commit. During the actual construction process though, we put several of the materials in the chest, including the placed torches. The construction process got to the torches before it had built up enough of the building to place the blocks that the torches had been attached to. This caused the torches to fall to the ground, effectively removing them from the plan, since it thought that they had been placed. We had to replace the torches manually after the rest of the building had been constructed.

What version of the plugin are you running? This should be fixed in the latest dev build. :)

This was in 0.5.0. I'll download the latest dev build and give it a try. :-)