As I understand it, the Olmecs were around maybe 1500BC to 300BC or so at the outside. Yet the article says "32 BC seemed awfully early for the Olmecs to carve this stone". WTF? Early? They'd been mostly gone for hundreds of years by that point.

If anything, assuming they carved it earlier and included the data of the eclipse as a forecast make as much or more sense. But the article is full of points like this, that seem superficially reasonable unless you look at them a little more closely.