I've got a sorting system that should put items into barrels using a router. I also have an overflow chest attached to this system in case I don't have a barrel for it. The router has Speed Boost, Bandwidth and Thoroughness, and my understanding is that this should put items in quickly, a stack at a time, and completely fill the barrel before moving onto another one. However, the thoroughness upgrade does not seem to work, as items will randomly split between the barrel it's supposed to go in, and the chest. The items would go into the empty barrels if I hadn't put stone in there to stop it happening. Is this a bug, or am I doing something really stupid and wrong? P.S. I've talked to a friend who's good with Factorization, he couldn't work out why it wasn't working either.