When Moxon (Mirko Ellis) arrives at the pueblo where Cooper (John Ireland) was hiding out, his face is bloody raw and ugly, but if you watch the scene when Cooper kicked him out of the runaway wagon, the cut on his cheek was nowhere as severe.
After the fight between Miguel and Cooper against the jail cell inmates, Miguel casually begins playing a harmonica that would presumably have to have been in his hand the whole time because he never reached elsewhere to retrieve it.