I'm using the new iCloud photos app and my iMac, iPad and iPhone. They have all synced and update each device when I make changes but the totals aren't the same. It counts my videos correct at about 300 but the photos are wrong. iMac shows 12,878 and stores full images. iPhone shows 12,874 and stores optimised. iPad shows 12,861 and stores optimised. I know it's not many but why should they be different and how do you mind the missing ones?