Phyllis ... my magic number is 97. I noticed this anomaly a long time ago.
I haven't checked every one of my uploads, but looks like all my images in my protected galleries have 97 FB likes.
I don't have the auto fb ticked, so at least in my case it doesn't have anything to do with that.
Maybe it's a kind of template entry that is telling the computer something, or the other way around. Odd, though, as if that were the case I'd think all of us would be seeing the same number.