This has happened to me before. I looked at the feed on my Nav Home Page one morning and it said I had edited a profile when in fact I had only just booted up the pc. Another time, I proposed a couple of merges but the feed said I had proposed them then it said I'd removed them, when I had done no such thing. I was a bit miffed about that one because it looked like I couldn't make up my mind, lol.