Garner's arm changes position between shots when he is talking to Wendy about his sister.
When Mitch comforts C.J. and they clasp hands, she puts her left hand on his arm in a fist-like gesture. In the next shot, her left fingers can be seen on his hands.
Neither the boat nor the bomb placed on it seem powerful enough to take out one piling, much less a whole pier. Indeed, the explosion might set one section of the pier on fire, but nothing more.
When Wendy is supposedly leaving HQ, she walks away from the exit stairs and deeper into the building.