So i tried to use the material trader today and the GUI confused me. If you want to make a level 4 item from a level 5 item, you have to click on the level 4 item, then the 5 item, and there's an arrow on the right hand side and it says at the bottom, gain 3 or something, which makes you think that you're infact making 3 of the level 5 item, but when you click make trade, you get a plus three on the level 4 item you wanted to make more of. A small thing, but i guess it's a quality of life thing!