Filter changing ranking

Hi!

I created matrix table to see sales of top customers and others. 

(I used this video for doing it- https://www.youtube.com/watch?v=-E_5BTPBXQY&t=190s).

1)Created table for top customers and others:

2)Created measure for customer ranking:

3)Created measure to check if customer belongs to top customers or others

Everything is fine if I add all values to matrix (I made matrix for top 15 customers). "Customer Ranking" values are correct and "Top 5 check" ("Top 15 check" in my case) values are correct aswell. Everything is OK even when I use date, country etc slicers.

But as soon as I add measure "Top 5 check" (Top 15 check" in my case) to filters ("TOP 15 check"is 1), then "Ranking" brokes:

Any idea how to fix my DAX measures so ranking would work?