If all third-party candidates had to vote for one of the two main candidates, I think nearly all of the Green Party votes would go to the Democrat, while the Libertarian votes would be much more of a split.

It's incorrect. Look at the NYT. The difference is that Politico's numbers weren't updated after the final votes were counted.

See how that says "99.8% reporting"? If you look at the NYT, it shows the results after counting 100% of the votes, and it matches what's in the picture.

The Green Party is far more left-wing than the Libertarian Party is right-wing.

Where are you getting those numbers? The ones in the photo match NYT and Wikipedia.

Why would someone who agrees with the Green Party platform prefer Republicans to Democrats? I'm sure such people exist, but I expect they're a tiny fraction of Green Party voters.