To reproduce:
Open **System Settings**.
Go to **Accounts**.
On the **Add Account** section, select **Ubuntu One**.
Enter the email address.
Enter the password.
Click **Continue**.
The **Accounts** screen is shown.
Click **Add account...**
Select **Ubuntu One**.
Enter the email address.
Enter the password.
Click **Continue**.
After adding the first U1 account, the second time you click Add account, U1 should not be available as an option.
To reproduce:
Open **System Settings**.
Go to **Accounts**.
On the **Add Account** section, select **Ubuntu One**.
Enter the email address.
Enter the password.
Click **Continue**.
The **Accounts** screen is shown.
Click **Add account...**
Select **Ubuntu One**.
Enter the email address.
Enter the password.
Click **Continue**.
After adding the first U1 account, the second time you click Add account, U1 should not be available as an option.
See the attached screenshot.