We use modified versions of the themes to better fit in with WordPress.com, so if you want the identical version to what we run be aware that's not what you have.
Note: Premium Themes are customized for WordPress.com usage only, and cannot be transferred to self-hosted WordPress.org sites.
If a Premium theme doesn’t work out we offer a full refund up to 30 days from your purchase. To cancel your purchase and obtain a refund, please use the Cancel button on the Store -> My Upgrades page. http://en.support.wordpress.com/themes/premium-themes/
Read-access to the premium themes forum is now open to all users. The premium theme forums are at http://premium-themes.forums.wordpress.com/ with separate sections for each theme. http://premium-themes.forums.wordpress.com/photography/
There is a link for access to specific Premium Theme support forum under Appearance -> Themes in your blog’s Dashboard, but do note that the premium theme must be active and one must be signed in as the user who purchased it in order to access the link and post to the forum there.