Will: We should've brought Jessica with us.
Rod: No she's dead. She was bitten by that zombie. We would've brought her, she would've affected all of us.
Bill: Yeah Will, He's right.
Other mistake: Throughout the film, you can frequently see many people's faces blurred, phone numbers blurred, store-fronts blurred, etc. This is because the production could not afford the rights to show these people, places and things, and simply blurred them out.
Trivia: After the underground success of the original film (considered a "so bad, it's good" cult classic), a sequel was eventually greenlit. Many feared the sequel would be self-aware and therefore not as unintentionally funny as the original. While it is true the cast and some of the crew were "in on the joke" and some inside-jokes were inserted for fans of the original, reportedly writer/director James Nguyen was trying his hardest to create a serious and legitimate sequel to the original film, which he considered an un-ironic "romantic thriller." Most of the self-referential inside-jokes in the film are the result of the producer and editor or the cast messing around... the script is actually almost completely earnest. (This is especially evident if one listens to the two audio commentaries for the film... Nguyen doesn't find the film nearly as amusing as the cast does).