The game seems to think you need 2 of the equipment item sto craft. Like you need 2 necklaces to craft 1 watcher's eye even if only 1 necklace gets used
You're absolutely right. Initially, the idea was that crafting an item would require, lets say, two rings, but since equipment items doesn't stack, it became necessary to tinker with the crafting system code, so I simply abandoned that idea. But some recipes still had the old quantity requirements. I've already fixed it.