Though the image posted may have tags from Photoshop, I have a hunch, which I posted elsewhere earlier.
If the original screenshot were 800x352 and the image we see now is 700x308, then the image was reduced in size (logically), but the dimensions still fit. 800/352=700/308, and if Photoshop was used to resize the image, then we have all our questions answered.
Though, I could be wrong and this could very well still be a fake, at least there's a reason it would be tagged from Photoshop and a different resolution than the alleged communicator in question.