In the final fight scene, Max accuses Lucero of killing Leo's family, but it was Finito who did the killing and kept it hidden until Lucero found out Max was alive.
The number of cars parked in front of the elevator, between shots.
At 31'06": the woman is held up with her head towards the hit-man's right then is dropped, hits the table and on the next shot, her head is situated towards the hit-man's left.
At 28'40": a man is killed by a bullet entering the left side of his head; the woman at his right is splattered with blood which is supposed to be coming from an exiting wound but she is not injured by the bullet.
Maria states that Leo can hardly breathe and yet he is in a hospital bed with no oxygen supply or breathing support.
In the first shootout scene with the Colombian mafia, the music that is playing in the background is not from Colombia, despite the closed caption subtitles suggesting as it. It is actually cumbia but from a Mexican band called Los Angeles Azules.
At 1:04': the thug is ejected from the back seat of the car through the windshield and off a few meters but Max is not; none of them were wearing a seat belt so the same force should have propelled them forward.
In the last katana fight, one of the katanas has visible blood over the blade despite it has not been used yet in the contend.
How is Max supposed to know his "father" was asked "head or heart" as he and Maria were not present when Lucero killed him and yet this is the message he leaves for Rafa to pass on.
Leo tunes Max's guitar as if it was done for good but a guitar needs frequent tuning: he should rather have shown Max how to do.