It did. I became a werewolf and some how it cured of me being a vampire, it still said how many necks I had bitten when I checked my stats but it also said that how many times I cured myself which it had at once.
Funny thing considering that you are supposed to be 100% resistant to diseases when you are a vampire or werewolf -_-
Anyways just thought I would share that with people to be careful