I hope this doesn't sound picky but I have the original photos of my ggrandfather and I posted them to my Ancestry tree several years ago. Now these photos show up on someone else' s tree shown as originally submitted by that person. I have not shared these photos with anyone else so the person must have taken them from my tree. That's fine and is why we share with public trees, but I would like to be given credit for originally submitting the photos. How did this happen and is there any way to correct it?