Continuity mistake: This is the car chase scene, where Ralph Fiennes and Angela Bassett are in a limo being chased by two bad cops in a pickup. Early in the scene, you have the view from inside the pickup when it rams the limo from the rear passenger side, and you can clearly see bullet holes in the glass and rear of the limo (no weapons fired yet). Then a few seconds later in the scene, you can see the rear of the limo with no damage. Moments later, you see one of the cops firing an automatic weapon, and subsequently witnessing the holes being made in the limo.
Continuity mistake: The second time we see Faith Justin singing, she has the microphone in her hand and is standing to the side of the stand. In the next shot, Faith is further over on the stage and the microphone from her hand is back on the stand.
Answer: The clip that Mace and Lenny have is a copy of the original that was made that Philo didn't know about. When he destroys the original by burning it, that leaves only the copy that was made and passed on to Lenny. He then has the only remaining copy, which is what Mace means.