I don't see how a population of H. neanderthalensis known to exist at 35k years ago and a population of H. sapiens known to be in the same region at the time conflicts with Out-Of-Africa. What this evidence shows is that the gene flow between the populations may have continued more recently than previously hypothesized.
The question now is why, with such recent crossings, is there not more neanderthal DNA in present sapiens populations. Maybe girls back then just didn't like the bad-boy neanderthal look all that much. Couldn't have been the other way because, lets face it, those neanderthal girls were just plain ugly ... with a capital U.