Other mistake: Not a mistake with the game but a mistake with the booklet. In the "History" section, it says Chris and Jill defeated T.A.L.O.S. in 2002, when in the game, and in RE: The Umbrella Chronicles, it's established that they defeated him in 2003.
Continuity mistake: During the cutscene where a Majini places the Plaga into the other man's mouth, the table shows there is no TV, however, when gameplay with Chris / Sheva begins again, a TV is on the table.
Trivia: In the first chapter Chris and Sheva are heading towards the meat shop where they will meet their contact. If you start running after the cut scene in front of the shop and get there before Sheva does, the contact will say, "I heard there were two of you. Where's your partner?"