I've noticed that upon first starting iWork in Yosemite or iOS 8, your iCloud documents get duplicated in a new directory exclusively for 10.10 and iOS 8. Changes in documents in iOS 7/ Maverick after this point do not get copied over to this replicate directory. There is NO syncing between the two directories!
It appears that as soon as you start using iWork on one single 10.10 or iOS8 device, you must stop using icloud on any non-yosemite/iOS 8 device.
It appears that as soon as you start using iWork on one single 10.10 or iOS8 device, you must stop using icloud on any non-yosemite/iOS 8 device.