I just read the character description on Drolta.
It just said that she is a puzzling old witch who serves under Elizabeth. She uses monsters as puppets and she hinders vampire hunters.
There is no mention whatsoever about her being Drac's 2nd form.
I wouldn't expect there to be. Graham Jones' AoS profile says nothing about him believing himself to be Dracula.
I'm just sayin'.... I don't really feel one way or the other about this whole thing. I can see where both sides are coming from.
While there are differences in the Drolta artwork and that sprite, there are a lot of similarities and both kind of give off a very similar impression, in my opinion. There are a lot of inconsistencies in games from artwork to sprites. Take, for example, Symphony of the Night. The Dracula encountered at the beginning of the game is not wearing the clothes his dialogue portrait has, and Richter has a completely different outfit and hairdo.
But if that is meant to be Drolta, then the transition from Dracula to her then back to Dracula was very, very hamfisted and confusing.