As this requires me knowing some personal details such as your wife's email address, I have moved it to our ticketing system and sent you an email.
On the Zone Manager app on my phone, I have registered myself, my wife and my son. However when I log onto family zone on the computer my wife does not appear. When I try to add her I can't because 'that email address is not original'. Therefore I can't register her as user of her devices. How can I fix this?
Looking at your account, there is your own user and your daughter. Is it possible that there is a duplicate account that you are trying to access?
For privacy, I cannot disclose the account here, but the one we have registered with your name is under a gmail account.
Hope this helps.