Sound Editing...or is it Mixing?

Does anyone know the difference between Editing and Mixing? This seems like a waste of valuable Oscar real estate, right? Couldn't they be doing another montage instead of giving out two awards for sound stuff?

And King Kong picks up one sound award, bringing me back to one behind Gavin. There's irony, the mic being turned off for the sound mixing guy...or is he the sound editing guy?

Jessica Alba is so hot. It isn't even fair anymore. By the way, Walk the Line was robbed. The friggin' movie was about music. Johnny Cash is not happy, and we don't want to be around when he wreaks havoc in anger.