uhm your doctor should have gave you a biopsy..
You don't know that you had HPV. The first dermatologist didn't think so. It seemed like you wanted a positive diagnosis, and the second one gave you that.
People get oral HPV infections. I don't know if they are extremely rare, but they aren't nearly as common as the genital ones. Genital HPV seems to prefer genital skin. If the girl had oral HPV I would guess that it is easier to spread it to your genitals than mouth because your mouth is a more difficult site. I haven't heard much talk about kissing as a way to transmit HPV anyway.
My guess is that the first dermatologist was right. If not, at least your warts are treated. There is no sense worry about oral warts that aren't there.