Trivia: Ironically, Arnold was the most outspoken critic of his iconic line during filming, arguing both that his accent would mangle the pronunciation of 'I'll' and that a machine would not use contractions in its speech. Cameron refused to change the line to his suggestion of "I will come back", so Arnold just gave it his best and was shocked when suddenly the number one request from fans was for him to repeat the very line he'd been vehemently against.
Trivia: Though she's a registered Democrat, Linda Hamilton voted for Arnold Schwarzenegger, the Republican candidate, in California's 2003 recall election that saw Schwarzenegger become the state's governor.
Answer: Gonna be totally honest... that might just be nothing more than a simple continuity error. They accidentally made a phonebook prop that didn't match up with the locations where they shot, and assumed most people wouldn't notice or care. (And to be even more honest, I never noticed it until I saw this question today.)
TedStixon