Can't separate normal account from superuser account.

Can't separate normal account from superuser account.

When I created my Zoho account earlier today I created admin@mostek.org with the intention of having an account for administration separate from my email account.  When I tried to create a new account for myself it said something about it already existed.  

I tried making changes but was unable to simply change the name of the account.  I currently have admin@mostek.org and chris@mostek.org which seem to be the same thing. I changed the chris@mostek.org account to primary but I'm not able to delete the admin@mostek.org, when I try it tells me to contact chris@mostek.org even though that's how I'm logged in. 

When I'm logged into my account it appears that the account name is chris@mostek.org but the email address is still admin@mostek.org and there is no way to change it. 

Please advise, 

Thanks