Wow, AP is acting weird for you! Haven’t seen any of this my self and haven’t heard of others having these problems. But something’s wrong. I’m very happy and thankful you are discovering these things – I just have no idea how to find the underlying problems. 🙁
One thing could be fairly easy to investigate though, I hope! And that is your file loading and seen as being modified right away. Does that happen every time you load that file? Please save it (and only experiment with copies) – don’t ever overwrite it. We need it for examination.
Just let me know if it happens again when you load it again. Thanks for all your help!