i'm having trouble with my iCloud photos. I thought i could be a little sneaky and take a photo of my photos that were more than 30 days old, so they would be uploaded along with my new photos. that part worked, but i can't upload them to Snapfish?!

i'm having trouble with my iCloud photos. I thought i could be a little sneaky and take a photo of my photos that were more than 30 days old, so they would be uploaded along with my new photos. that part worked, but i can't select them to upload them to Snapfish?! Any thoughts? I'm bummed. I've got a few hundred photos on my iPhone that I'd like to move seemlessly - or somehow at all.