SOUFEEL Film Roll Keychain Customized Keychain with Picture Personalized Camera Memory Reel Gifts

When I click customize to add photos, there is only slots for 5 photos, but description says it can take 10 photos. Where do I add the rest?

Which picture rolls out first, photo #1 or #10?

If I only choose 6 pictures will there be 4 blank pictures? Or will there only be the 6 i choose

Will the pictures/ end product be shared anywhere? Or will it remain confidential