Confused

Rating: Null/10 (18 March 2007)

Im so confused....
I don't get the ending of the movie could somebody explain it for me? i don't understand how in the gray scene the mom and child were in the house where the guy was sleeping yet there was no guy on the couch but then in the color one the guy was on the couch but they girl and child weren't around and then he goes to the door and its wide open. i don't understand the whole gray and color thing, could somebody please help me. Also what were the "goblins"? they never explained it.. were they just people who were caught in the fire and mutated? or what? this movie lacks a lot of information