Occasionally when I go through my post history, I see activity that says I "liked" posts that I have no recollection of liking. In fact, some I flat out don't like, yet for some reason my activity says I "liked" or "favorited" the posts at some point. When I try to unlike these posts, they don't stay unliked (they revert back to "liked" when I refresh the page). Anyone have thoughts on what could be happening? No offense to posters but I don't want people falsely believing I find their posts interesting.