The more recent articles I've read make a huge distinction between the two with regard to gravity. Dark matter, like black holes, has the property of high positive gravity (center of the galaxy, etc.) Dark energy, OTOH, has the property of negative gravity, e.g. the "vacuum" of space between galaxies, causing the acceleration of the universe.
I don't think they were ever treated as the same thing.
The more recent articles I've read make a huge distinction between the two with regard to gravity. Dark matter, like black holes, has the property of high positive gravity (center of the galaxy, etc.) Dark energy, OTOH, has the property of negative gravity, e.g. the "vacuum" of space between galaxies, causing the acceleration of the universe.
Well, there isn't any negative gravity; it's the same old gravity that causes that repulsive effect when the vacuum itself has an energy density. Analogously, the bubbles in your glass of Yuengling Lager aren't accelerated away from the center of the Earth because of anti-gravity, but because of gravity. It's not the same effect, but it gives you the idea. Mmm, Yuengling.
I guess I'm not really seeing why you think dark energy is considered to be behaving differently in this case.