Are vampires bugged from the patch?

As stated above, the vampire perks will no longer function once you travel to a different lot. This applies to all vampires in the household, not just the one(s) you have visit said lot. You can use the drought of reconfiguration to have the perks take effect again, but they will fail once again every time the player clears the load screen.

So, if you keep them at home then everything is fine. Not exactly ideal.