[Q] Things moved and added unknowingly topic

Please, someone help me out...Is there a way to tell times my tablet has been used. There have been a few instances where apps have been moved, things have been deleted and last night, I got on and I had 5 extra pages added. I didn't do it. And nobody else could have done it around me. Does anyone have any clue what could be going on? Is there some kind of master password for all products or something or could someone on Samsung's end be getting in, like someone working for them? This is getting semi creepy.