Seperate origins is not Darwinian evolution. No where did the article even suggest this to be the case. All they do is suggest that these ancestors are likely to be more complex than their descedents.
Furthermore, no evolutionist, getting paid by our taxes, would ever make a statement like yours. It would be the equivalent of stating "please shut off all our funding, our work is bogus." Not going to happen. The college deans would go nuts over anything that would threaten their revenue stream.
Remember the old "missing link" business? What we have here are some "missing classes, orders and families" ~ a lot more than a "link" sort of thing.
None of this is surprising if life, per se, in all of its various locations throughout the universe, shares the same fundamental engines ~ they should be expected to be shuffled a bit differently (but otherwise utilize the same DNA) coming from different places.