@Danny – Thanks for commenting Danny! I’ll try to clear it up. Mounted combat was presented as though it would be an inclusion in the Dawnguard DLC. Media and bloggers alike then wrote about it. However, as you stated, mounted combat was released with the most recent update. The conflict you’re seeing is due to the timing of the mounted combat release and the publishing of articles about Dawnguard, which occurred prior to the patch release. In an effort to maintain accuracy, we’re modifying this article to reflect the mounted combat inclusion prior to Dawnguard.

Hope that helps!