No tableau on this machine so I can't open the file, however I suspect you have the filter Index calculating differently to your rows Index. Make sure they're both set up exactly the same.
the Index pill in the Row shelf is a counter 1, 2, 3, 4, 5, etc
i all a table calc that says rank the product names by Sales, restart at every new Region. It looks fine, all 4 regions are ranked and at the start of the new region, the Index restarts at 1. BUT, when I drag the Index field onto Filter Shelf, and select 1, 2, my regions disappear... its the same Index() formula on Filter and Row shelf..
If the setup between INDEX on filters and rows is identical then this doesn't make sense. As I can't open your file I can't help any further, someone else out there will be able to pick this up.