I've read TFA, and thanks for adding some clarity, but I still have to wonder when they'll sequence the DNA.
Apparently you neither read the TFA nor the reply to your original false assertion that they didn't sequence the DNA.
Nor does your claim "if it's just an already known species then it's just contamination" make any sense.
I was on a remote island recently. I picked up an odd feather on the beach. I brought it back home and used it to identify the bird it came from. It was a known species.
There is absolutely no basis in that observation to support the claim that my backpack had somehow become contaminated by feathers from that species, and DNA is no different from feathers in this regard, when subject to ordinary standards of careful handling for such samples, which were obviously applied in this case (that is: the people doing the research are not and should not be presumed to be complete idiots.)
So you're completely wrong about all that, but have a nice day anyway!