When Earl enters the DC apartment he shoots at Max, missing him and shooting through the window. We see holes appear from the interior shot, then see the glass shatter from the exterior shot, but when we cut back inside, there are only three holes in the glass again.
At the end of the movie, the boat has already hit the buoy, and has almost completely capsized and is sinking. The next shot shows the detective yelling to the two in the boat which is once again floating perfectly.
When homes are broken into, it is burglary, not robbery. This is referenced several times throughout the movie. However, since the victim was home at the time of the burglary it is in fact called a robbery.