Does iCloud Photo Library avoid dups between devices
I am implementing iCloud Photo Library for my iMac, iPhone and iPad. I have over 50,000 photos. Some are on all three devices with some of these edited on one device but not on another. Will I get a lot of duplicates once the library is set up? Also, after setup can I create an album on an iPad or iPhone and have it automatically transferred to the other devices? Thanks
iMac, Mac OS X (10.7.1), iPhoto 11