A dislocation and a break can occur at the same time. They are different as mentioned above.
The guy might have had a fracture and reduced it - meaning put it into an alignment so it is no longer at an odd angle - this is what is done in A+E before they plaster you up.
A dislocation can be extremely painful even after you have reduced it (put it back) it depends on how much damage has been done to the soft tissues during the dislocation. The ease of putting it back depends on the location (which joint) the position it is in and how much spasm is in the muscles. Sometimes easy, sometimes you have to knock the patient out while doing it. Shoulders can disclocate forwards, backwards and downwards for example and each has their own problems, sometimes the main problem is not the dislocation per se but the resulting nerve damage.