I think I see the problem. I didn't read that as one sentence. The author put a hyphen in the middle of a line which read to me as more than one sentence or thought being mashed together from the source document. Maybe that's not what the writer was doing but it looks like poor shorthand by a hack journalist copying from a scientist's paper. I see it in several places.
So I concede. As chopped up as the writing is I don't know how either one of us can say for sure what the writer meant.
“I think I see the problem. I didn’t read that as one sentence.”
Thats the Neanderthal genotype manifesting, apparently.