I'll respond here to essentially both DB's comment (quoted here) and the discussion in the general discussion thread. I find it interesting that, when this happened, the Phillies' announcers focused on Herrera's mistake, and offered really no discussion about why Galvis started, then went back to 3B. They just treated it as, "that's what he did."
Now, there's no question that Herrera made a mistake here; he needs to be looking, aware that Galvis is still on 3B, and picking up the 3B coach, who presumably was waving him back to 2B.
But, several comments, questions, speculations:
Is it possible that Herrera WAS watching, saw Galvis break for home, looked to see where the ball was in the OF, and broke for 3B, judging that he could make it? Essentially, that Galvis' start and stop deked Herrera?
What was Samuel actually doing? Did he stop Galvis, or did Freddy do that on his own?
Was Samuel aware that Herrera broke for 3B? Did he try to communicate, "GO BACK!"
So while Herrera erred here - in not picking up that Galvis had returned to 3B, and in not forcing a run-down at that point - there are real questions about Galvis' actions, and Samuel's, as well.
The fact that all the Phils' announcers focused only on Herrera's mistakes... well, I guess that's not surprising. People see what they want to see.