When you have the perks to have a chance crafting 'fine', 'masterwork' and 'legendary' weapons, I noticed the weapon crafted will sometimes have +5 or +10 stats randomly speced in different stats, but the names will always be 'crafted [weapon name]', and when you go into inventory to check the crafted weapons, they don't have that +5/10 stats, and when you crafted multiple weapons with different bonus stats, they stack together as if they are exactly same weapons. I don't know if the bonus stats just don't show or they just got erased after crafting.