iPhone 4S missing contacts
I've noticed several contacts missing from my iPhone 4S - for instance, my daughter! They are still in Address Book on my computer. Doesn't matter whether I use iCloud or not. I've gone to the Info page with iPhone connected USB and WiFi, gone to Advanced and selected "replace information on this iPhone" and selected "contacts," but the missing ones do not appear. I don't know how many contacts this is happening to - its just when I go to call someone - like a once a year client, I discover they are not there. Any suggestions?
MacBook Air, Mac OS X (10.7.2)