I've been having trouble consolidating two Microsoft Accounts. One is connected to a primary email address, and another to a secondary address. I had created two due to the confusion with signing up for Windows 8 Consumer Preview, and transitioning to Windows 8 Pro. I used primarily the account associated with my secondary address - however, some items were associated still with the other account. After transferring those products over, I thought I would be able to close the first one (associated with my primary address, which I did), and add that address as an alias to the second account. However, when I attempt to add my primary email address (now disassociated with the first account), I get the error message in orange text above the input box: "This email address is already taken. Please try another."

Is this a glitch in the Microsoft system, hard to find in the menus, or is it intentionally disallowed? Furthermore, if it is possible to do this, how would I go about doing so?

Thanks