Task, Milesstone, etc activity Tracking

Task, Milesstone, etc activity Tracking

I'm just starting to use Project and am struggling understanding why the administrator doesn't have the ability to track the creation and deletion (on a macro scale if nothing else) of tasks, milestones etc. AND the ability to restore them if accidentally deleted. (Maybe not every edit of the task but the last version before deleted.)  So this is what happened in my test of project.  I spent an afternoon putting together a schedule.  After several hours I added a user as a manager.  That user claims all she did was "look" at the calendar and the task details.  However the next day when I fired up project 2/3rds of the tasks were totally gone.  And I found no way to see a task history to see who or what deleted the tasks.  This is a deal killer in this day and age.  

In my specific case I don't believe the new user (my wife) deleted them. I think they system did somehow. I'm very hesitant in using this in anger if I'm going to lose sleep worrying about tasks mysteriously disappearing with no way to restore some version.  Floors me that the developers would actually delete the database entry for a task rather than just mark it deleted (and by who) at least for some period of time.  Just saying....