OK. I get the concept of Photo Stream. It appears as a separate section in the iPhoto navigation menu.
But iPhoto is also *duplicating* all the photos I import into a month-based "photo stream" which is stored *in my library*.
For example, all the photos I imported this month are duplicated in a "Nov 2012 Photo Stream" album.
This means these photos show up *twice* in my Faces.
I like the iCloud Photo Stream, but I don't want these "hard copy" photo streams being automatically created, and duplicating my photos in my library.
How do I stop that?
Retrieving data ...