Photostream and the Camera Roll
I'm confused by the Photostream feature as it applies to the iPhone and my Mac at home. My understanding was that the pictures would go to Photostream and if I happened to like a bunch of shots I could save them to my Camera Roll so they wouldn't disappear when I passed a thousand pictures. Instead, everything goes into Photostream and also to the Camera Roll. This means I'm doubling up every picture I take on my phone and then on my computer when I sync to it at home, right? There isn't really any good explanation of this process from Apple and it's not operating as advertised. It makes me want to shut down Photostream so I can leave things as they were. Am I looking at this the wrong way? Does iPhoto know when Photostream and my Camera Roll have matching pictures so it saves only one copy? Is Photostream really just streaming photos from iCloud without taking up space on my phone or my Mac? Is my Mac going to keep all of the Photostream shots including lame ones I don't want? If not, how do I make sure I keep the ones I do want? Where's the manual for this feature?
MacBook Pro, Mac OS X (10.6.8)