Bloodcrust Vampire 0004872B suffers from bad listing. UESP says: "The Bloodcrust Vampire Spellsword suffers from bad listing: it has no armor, and its weapon leveled list is not as good as that of the other Bloodcrust Vampires."
Bloodcrust Vampire 0004872A and 00049197 suffer from bad listing. UESP says: "The two Bloodcrust Vampires Warriors suffer from bad listing: they have no armor and their weapon leveled list is not as good as that of other Bloodcrust Vampires. In addition, the Female version can't transmit Porphyric Hemophilia, and can instead cast the two Destruction and Restoration spells listed."
Vampire Bard 0003264D , 00069AE8 and 00069AE9 suffer from bad listing. UESP says: "One of three Vampire Bards does not possess a weapon. As the Bard class doesn't have Hand to Hand as a major skill, it is presumed this is a listing error." "Leveled Dagger, Shortsword, Longsword or Claymore (67%) * or no weapon (33%; see Bugs)"
https://en.uesp.net/wiki/Oblivion:Vampire#Bugs