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My point, [no pun intended] exactly,
The items pictured in the posted article are so far below the quality of even routine, utility Mayan knapping, (much less that of "ceremonial" pieces) that many of us can't help but suspect the site was "salted" by some "modern" person.
...and, then, there are what we modern lithic technologists and knappers call "Mayan show-off masterpieces", like the ones you posted.
I consider myself good enough to be able to closely replicate 'most any lithic piece found in North America -- but I don't have access to sufficient, primo knappable material [or super-glue] (nor does my vocabulary contain adequate cuss-words) to get me through trying to replicate one of those gems! '-)