Can I clear my contacts off y iphone, and then sync with iTunes and return them back to y iphone, my IPHONE keeps retaining nos that it shouldn't, I delete them off, during edit, and they just return and added to the new contact along with the new no.

I Really would like some help, this problem has been with me for a couple of months,

i seem to be having problems with my contacts.

WHen I edit a contact, and pop in a new contact number, and delete the old number. It looks like it has been done. when I go to write a message or go back into the contact, it has the old number there again, I have deleted off the computer contacts as everything is under I cloud anyway. It seems fine on my iMac, but still retains the old nos, and other info, mainly on my IPHONE. Would it be useful to take all contacts off my phone, and reinstall them from my iTunes, or back up of whatever.. I am a nana, so please. Be gentle with me..

Regards

Jan .