Check out round one! clottey was stepping on pac's lead foot for him not to dart out. pac adjusted after that round by just turning to his right.
I think many of those "missed" punches werent really to KO Clottey. A lot of them were strategic punches, to either pry open Clottey's guard when it's closed shut like an armadillo, and when it opens up, he throws harder punches.. Or pitty-pat punches to make Clottey close up momentarily when MP is about to go inside for a quick flurry so he'll be less likely to get countered.
Honestly I would have liked it more if Clottey would have done his ring walk dance of stupidity, touched gloves, got one second into the fight and had his corner throw in the towel, it would have saved a lot of people time and sleep than to watch him stay in high guard for 36 minutes straight.