I can not create more than 1 item in the furnice and the forge. I know its with the shift and left control but for me it is not working. Maybe this isn`t a bug and im just doing anything wrong. If someone knows something pls help me =D

You need to make more furnaces and forges for more things. Shift allows you to craft half of max and left ctrl makes the max. Or do you mean you can't make more than one item of a single item?

Yeah i try to make as many as possible or half as many and nothing happens

Make sure you have the necessary materials though!