Dupe Bug.

1. Use the crafting table to craft, Right Clicking to remove more than 1 item.
2. Set recipe to a slot
3. Right Click to use the recipe.

It will use 1 set of items, but give you however many you originally right clicked out.

i.e.

1. 10 stacks of Cobble, Craft 9 Stacks into 1 stack of Compressed Cobble.
   Inv = 1 stack of Cobble, 1 stack of Compressed Cobble
2. Set the Recipe
3. Each right click of the recipe takes 9 cobble, for 64 Compressed Cobble.

Repeatable with all crafting recipes, not just for block form.
Botania r1.3-143
Dark Trilogy Modpack 1.0.5

Can provide video if needed to demonstrate.

Ouch, I see. I'll do some more forceful checking.