Random Thought 1

I've begun to notice a staggering red flag as a delve into this novel. He's gone many places in the book, and at a few of these places the people there have referred to Patrick Bateman with a completely different name, to which he acknowledges like its his real name. Did he lie to these people about his identity? Or are these people just getting him confused with another person entirely? Whatever the case, this seems very strange to me, and I'll be sure to keep and eye out for any sort of explanation.