Why are old tagged photos suddenly appearing on actor's pages?

Multiple friends of mine (and myself) who have IMDB pages are suddenly finding old tagged photos from show/movie galleries appearing on their pages within the last week. For years, the tagged photos existed but didn't show up on the pages. Perhaps this was a site wide glitch that went mostly unnoticed. How can the person go back to the previous point where the photos were not visible? (Considering many of them have unwanted photos...myself included.) Thank you.