If you try to break any Mekanism machines with an awakened ichorium pickaxe (square or line mode) the Mekanism blocks DO NOT drop. Very inconvenient way to lose potentially expensive machines. I've had this happen a couple times now. Edit: Lost 2 Electrolytic Separators and 1 Hydrogen Generator
They were, I put them there. That message was just letting him know I reimbursed the items. Never use these uber pickaxes to pick up or break anything you don't intend to lose.
Anything that breaks multiple blocks should never be used on machines. That means awakened ichor picks, shovels, axes, and all tcon tools should be put in a bag when at your base so you do not accidentally use them. I have even had the ichor shovel take out enderio machines when I was mining dirt next to them. (I know, we do not have enderio, but better to be safe than sorry.)
