I would suggest trimming down the size of your workbook to focus on one or two sheets and only the fields needed to answer your forum question, when uploading to the Forum. Your workbook has a ton of sheets and data in it, and I have no idea what I am supposed to be looking at. It will help us help you if you can do this.
What is the reason you need two copies of the same datasources?
When you created the two sheets off the same datasource:
they would have their own filters....
You apply filters to each of these sheets that don't affect the other. (Or parameters as well if need be)
When you want a filter such as Unit and Audit_date you would "Apply to all Using this Datasource"
making it "Global"
I might be a little confused as to what you're trying to achieve?
If I have any false assumptions could you let us know in more detail why you need two datasources.