Nothing is wrong. I'm thinking the rheostat in the fan is pulling amps and acting like a dimmer switch. Obviously the power for the light is being pulled off the outlet circuits. I would install a ceiling fan with a light kit. Most likely the culprit is the fan.

Congrats to your son, home ownership can be a wonderful thing.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken