weapon/armor improvement cap?

[eleventyhundred3]

im trying to improve daedric armor and dragonbone weapons, even more so than my current set, however even when using potions as well as tons of enchanted smithing armor, it turns out the same armor/weapon rating as the old armor, as if there is a cap. i even used a calculator to make sure, and it should be further improved. i have the unofficial skyrim legendary edition patch, is that the cause of this? is there a way around it? thanks.