Hi guys and girls, long time lurker here. Had a search for the topic but couldn't find anything. Anyway, I am in the process of smithing my first set of daedric armour, but I have come across some weird things. If I approach the forge in my full set of dragon bone armour, then the armour rating for the daedric main piece is 110. If I take all of the armour off, or the set I approach the forge with isn't a matching set, then it drops to 88. Has anybody else has this happen?

Does the Dragon Armor have a boast heavy armor enchantment?

Or a boost smithing?

No, that's the weird thing, I have a necklace of smithing (+20%) and a bracers of smithing(+20%) and when I put these on the rating goes down to 88. Only when I had full dragon on did it rise to 110. This is when first crafting the main piece, NOT improving to legendary.