try using [dg category=”2011, Affordable_care_act” relation=AND localpost=false]
I found the quotes are essential for categories.
Note: it does not use slugs, but the actual name. For example, a category called: ‘Affordable Care Act’ must be category=”Affordable Care Act” or it will look for each word without the quotes.
Hope that helps. If the language is not perfect, I’m hoping the insight will help you figure it out.