my details won't update

I recently set up each of my children with their own email account using my icloud account, everything seems fine except my computer now thinks the main account holder is my daughter or at least that i have changed my name, and I can't get it to change the details back, I go into accounts on sys prefs and click on icloud, then account details and sure enough there is her name even though it is still my email address at the top, if I then go into mail, contacts and calendars and look in the details section of icloud there, this also has my daughters name, even when I change it and leave Mail, Contacts, etc

help?