Details, details, details...
Pictures at Ten!
I don't use iPhoto, but I understand there is a button/menu choice labeled something like "Turn on Photo Stream". Have you used that? There may be some prefs in iPhoto that need setting, also.
Found an interesting bit in this <
Apple Support page>:
QUOTE
How long are My Photo Stream photos stored in iCloud?
The photos you upload to My Photo Stream are stored in iCloud for 30 days to give your devices plenty of time to connect and download them.
I never put two and two together about these photos not counting against the iCloud storage space. It's simply because they don't stay "stored" for very long.
The point is, you may not see images in iPhoto that were placed in iCloud from those other devices more than 30 days ago. iCloud is simply a temporary storage location to allow all the other devices to sync. The images are actually on/in the devices, not in iCloud.