iCloud library adds ALL photos to Camera Roll on IOS Devices

Just wanted to make a clarification... I don't actually see the Camera Roll Album on my iDevices..

But when I go in to the Photos app on the iMac images do appear as if they are New rather than already imported., and they get imported / duplicated again.

Thanks LACAllen..

I understand the iCloud is a sync service, which is why I don't understand the behavior Im seeing.

I add photo A to my photo library on my iMac using import on the photo app.

Photo A get sent to the iCloud photo library and synced to my iPad and iPhone.

That's expected behavior.. The way I would expect it to work.

I take a picture with my iPhone and that photo B gets copied to my iCloud library and synced to my other devices..

Again working as expected.

BUT when I physically connect my iPhone to the iMac ( to backup sync with iTunes) , The Photo app launches and sees Photo A as a new photo which gets imported into my photo library , copied to my iCloud photo library and synced with all my devices.

Now all my devices have two copies of Photo A on them.

This gets amplified when I connect my other iDevices.. I get a "new" copy of PhotoA when I connect my iPhone as well as a 'New' copy when I connect i iPad.

So after connecting both my iPhone and iPad to the iMac I end up with three copies of Photo A.. Which gets synced to my iDevices Which gets imported as a new photo when the devices are connected to the iMac

And that loop keeps churning away every time I connect my iDevice to the iMac.. I seems to only happen to photos I add to the library on the iMac. Pictures I take with the iPhone don't seem to get duplicated.

So I guess my question is .. Why is the Photo App on the iMac seeing the iCloud Library synced photos as "New" rather than "Already Imported"

Gary