But thats the normal functionality of QV and you dont have to do anything differently as far as I know. If you copy a sheet and paste, then you have have the same selections on either of the sheets. Can you try creating a new file and then test it? Just close everything and try as this is strange. Please let us know what went wrong.
I did a quick test on a new file and it works fine as expected. The original is a template that I've been using that was created for us by QlikView consultants. There must be something wrong with the template. I'll have to re-create the entire app, but at least you helped me find the problem. Thanks for all your help!