Hi Kjersti,
Thanks for posting!
This is not behaviour by design, and the license IS being processed by all the same components and code. Make sure that when you enter the license, you copy/paste both the name and key to be certain they are correct. There is no need to buy a new license for VS2012. If you can't get this to work, please get in touch via the 'contact us' support form on this site and I'll check your license details for you.
Cheers,
Remco