This simply isn't the right way to set up the devices, it should be obvious that if you sign into iCloud, its going to sync your iCloud data... One account corr

This simply isn't the right way to set up the devices, it should be obvious that if you sign into iCloud, its going to sync your iCloud data... One account corresponds to one person. Create an account for each person, and use that during the initial set up. For iTunes, you can have a shared account between all family members so you don't have to purchase things multiple times.