Odd really? if only you're a vamp? Does it matter what level vampirism? I forgot to check myself after clensing a vamp den an contracted it wearing Ebony.. Didnt notice it missing.
On the neck line, I will look @ my char in it.
Tho on armor choices. Go Daedric, it is by far strongest heavy armor, above dragon armor.
I did for my other character. For this character I just want him to wear the ebony armor because I like him in it. :3
And regarding level of vampirism, it didn't seem to be a factor, because I'd go to starved and it still wouldn't show up. Was equipped, and I could block, but it was like the model disappeared. I could drop it too, and it would show up. It was also in the menu fine. Just wearing it third or first person, it doesn't show up.
I'd upload an image of the black line I get and the invisible shield, but I'm new here, and don't really know how to.