Inaccuracies in Resident Evil

Wesker's height
Compared to other games, Wesker has grown significantly since Resident Evil Zero.

Spencer's notebook
Spencer's notebook does not mention the "Unnamed Umbrella Executive", who ws hinted to be Spencer in Umbrella Chronicles. Instead, the notebook claims that he was not near Raccoon City at the time of its destruction.

Omition of Edward Ashford
The files did not refer to Edward Ashford as having been involved at all with the formation of Umbrella.