Davis shorts literally every punch thrown by Chuck because he brings the mitt to meet him at almost halfway there or more.
Also, the way he's using pads makes it so there's "two heads" of your opponent; the hook is where someone would be in one position, and the straight somewhere else - it's not helpful when the punches are in the same combo, but the mitts are if the opponent would be in two different positions.
Maybe he just wanted it to look good for the camera with some thuds or something, we never really know with relatively short clips, but yeah, nothing good was gained from that.