Login accounts

Untill today I had only 2 accounts on my computer. My main account which is also the administrator and another account for my mom if she needs the computer. I read that the administrator account should be a seperate one from any main use account. I created another account called Admin, but it does not show up in list view when its time to log in, only my 2 previous accounts are shown. I could change the view to name and password and manually type in the admin and pw and gain access. Anyone know why I cannot see this account in list view?