unable to sync events from iphoto to my ipad and iphone

Recently I upgraded from Lion to Mountain Lion. I upgraded also my iOs on my iPad 2 and iPhone 4S. Everything works fine buy when I sync on my MacBook Pro using iTunes for my iPad 2 and my iPhone 4S, my photo library on my devices are crazy. All the events dissapears or some of them are "divided" in more events. I mean, theres the EVENT 1 on my iPhoto in my MacBook with 85 pics and after I sync, the event on my iPhone dissapears and I have 85 "events". Some one told me to unistall iTunes and then reinstall it to rearrange the libraries but I can't unistall the iTunes.