iphone help

[butterflylady]

I have an Iphone 4, not the newest one, in my contacts, they keep doubling and trippling up, how can i stop this from happening??
I have previously deleted the doubles off my yahoo mail, and i only sync with itunes when i sync my phone!

 

[DefBref]

You are syncing your contacts by more than one route, do you use icloud? or have you set up your email as an exchange account? Either method could also be syncing your contacts as well as your itunes sync.