Saunders gives Almeida an IP address that starts with 257. No IP-address can include a number larger than 255. This is equivalent to the fake telephone numbers used in movies (the 555- prefix used for numbers in the USA, for instance).
When Jack and Chase have surrounded the building where Steven is, a guy in a white t-shirt is visible in on of the top windows of the building, walking around a few seconds before Jack takes up the megaphone to talk to Steven. Why isn't he secured?
The goof item below may give away important plot points.
At 8:58 am, Stephen Saunders successfully gets Tony to move one of the teams away from the building he's in, allowing him to exit and walk casually down the street. The location is South Garey Street and Third Street, just southeast of Downtown Los Angeles. As the camera tilts up, we can see the glow of the sun coming from the left of the Los Angeles skyline, which means this shot was taken in the afternoon, yet the clock ticks to 9:00 am.