Okay, I don't mean to be pissy here, but according to the site that you yourself listed in your post #2 Salem Witch Trials, they have listed 19 people hanged. The site I listed in my post #5 List of Names lists 19 people hanged. Then you said "Well acording to the many museums in Salem"...18 people hanged, Corey Giles pressed to death. So, with the thought that perhaps the Salem museums may be listing it differently I went to several Salem museum websites. The first one:The Salem Witch Museum it lists 19 people hanged. Then the Witch History Museum lists 19 hanged "one old man crushed to death. (though it's not a great site and it's hard to read, yet it is written there).
Then there's the Witch Dungeon Museum listing 19 hanged, 1 pressed to death.

What I'm getting at is while it seems a silly point, to press that it was indeed 19 people hanged, I think it's number one, important to make sure everyone that died is honored and number two, give credit where credit is due, that Fiona (or her research team) was correct.