I would wonder if all his 'pieces' are present and if the dna of the jaw matched the dna of the skull and of the eye ridges.
Not saying its a booboo, just saying it looks like a decided effort not to waste any fragments. Nothing untoward intended, but for my tastes, the difference is really 'much'! I would want to know who and the steps taken and the where of the find, etc ... oops, there went my invite to visit!
As for being located where they were ... and the fact that they were insular in their settlement ... not difficult to imagine a hunting party being somehow lost from their main range, and being stranded (natural catastrophy, capture/escape, or ??) ... and living out their lives in another area (how far removed?) ... for the duration. Not a happy story, but possible.
If that seems entirely unlikely to you, please say so. I'm just thinking with minimal facts.
As for that cave art ? -- Chauvet? ... wow, impressive, and linked (from my view) with the Corbel Niches -- Puma Punku => Giza.
Its in the eye of the beholder, but that's impressive.
Makes sense it would not be a widely portrayed scene. 16 predators. ... also noted in Magicians of the Gods in varios locals from Peru to Gobekli Tepi. A sigil of an age. :-)
Mind is the rider.