General Question: EditingContext.saveChanges() and the back button

Hi List,

I have a general question regarding webobjects-programming and back-button
issues:
I have two instances of subclasses of EOCustomObjects in a list. In a
component I edit the first one, but do not call
editingContext.saveChanges();. Now I hit the backbutton, edit the second
instance and call editingContext.saveChanges(); afterwards. As expected the
changes in both objects are saved. But I consider this quite unwanted, since
normal web-users should not worry about the webapps' editingContext.
Is there an easy technique to avoid this behaviour? Or will I always have to
work with copies of objects?

Regards,
 Philipp