Contact Management - Choosing Account to Activate the Add Contact Button

In your contact management help it states that the add contact button will be enabled once an account has been chosen. How do I do this? The left hand pane has All Contacts (highlighted), Personal (my account name) which is greyed out and Found In Mail (which I can choose if I want to.)
Nothing happens if I click on “Personal.” Is this how I choose an account or am I missing something?
Any help would be most appreciated.

This is actually a fairly incomplete feature. We intend to improve this in the future: Bundle: Contacts