In Pagelines Framework, it was incredibly easy to choose a different layout for an individual post. All you had to do was open the post in the editor and select a different layout option in the Pagelines Meta Settings. Your chosen layout applied only to the single post. We used this feature all the time.
In DMS, applying a template to an individual post actually applies that template to ALL posts. It doesn't appear possible to apply a template only to individual posts. You can do it for Pages, but not Posts. Are we missing something or are individual post layouts not possible with DMS?