This glitch is very well known. My argonian became a Vampire. I did the quest, but it gets glitch with bloodgrass. I did the garlic, then argonian blood, then the ashes, then the nightshade, BUT SHE WONT ACCEPT THE BLOODGRASS!!!! So, the quest was cglitched. I created a new character, made a Breton, and now I am a powerful battlemage

But yeah, this glitch is quite cool but will dissapear with the new patch, along with the Clavicus Vile glitch and the Vampire quest and weapon sell glitch, so, enjoy it while you can. Oblivion remidns me of Daggerfall when it came out, glitchy as hell. Quite sad, really.
What's more humiliating, He who lives by the butter knife, or he who dies by the butterknife? (Making fun of Martin for killing Deadra with a glass dagger)