I had someone pass me a plan for a thorium/plutonium reactor. It produces 216 EU/t. I plugged the specs/exact design into the planner. The planner told me it was a Mk1 breeder reactor producing 5 eu/t! I went ahead and made the reactor and it makes 216 EU/t, instead of the planner's 5. Here is the link to the design http://i.imgur.com/x3KlOKO.png this is the image he gave me to run off of. IDK how long that link will last. If you cannot see the image let me know and I will re post it. But as I said, what the reactor planner said would happen, and what actually happened are two completely different things.