No big deal, but thought you should know.
So I put in 4 images with captions. 2 of the images are related so I put them one after the other.
I viewed the page, they weren't in the order I'd put them in. Went back to edit, and sure enough, they had rearranged themselves. So I deleted and put them back in the right order. Happened again! but rearranged themselves in a different order than before.
They ARE staying with the correct caption, so that's a good thing.