Can't really show what's going on because it's for my company though this happens every now and then. I just launched max then opened my scene and theres somthing selected but I am not selecting it. I convert to edit poly and click another object it's still selected. Reset xform convert nothing though I have recently…
Sure you don't have Selection Lock on? (The little padlock icon near the centre of the toolbar at the bottom of the screen). Default key for that is Space so it seems likely you might have hit that then saved the file.