Print configuration reverts to default

I have set up a number of A3 and A4 print configurations but the A3 versions always go back to the default configuration after I have saved and closed the drawing file. The default is an A3 landscape sheet  but it has a built in offset, whereas my print configurations are set up with zero X or Y offset. Every time I open the drawing I have to go through the sheets and activate and assign the required print configuration to each. When I save and close the file they still revert to the default configuration again. How do I overcome this?