So it took me several months to upload all of my 19k photos to iCloud, because I had to constantly turn it off due to no bandwidth and such. Anyway, it finally finishes, I log out of my account on my Macbook Pro. Wife logs into her account on same computer, does her stuff, whatever. A few hours later, I log in and open Photos and what do I see? The entire upload is starting all over again. At first, it ran through the 19k photos pretty fast. Took like 5 minutes and the status bar filled up. When that finished, it read "Uploading xx,xxx items", counting down from 19k again. It's been running for over an hour now and it looks legit. Activity Monitor shows huge upload activity and the long slow countdown is happening. WTF? Is this a joke? iCloud shows all my photos there. What is there to upload? At this point, I'm ready to just get rid of iCloud and just run time machine backups.