Had to do a few things to get the Top N parameter working. First, the country filtered wasn't applied to your CLF dots worksheet so I applied it there. I also made the Country filter use Only Relevant Values so that it filters itself based on the Region filter.
On your CLF dots worksheet, I then made the Region and Country parameters context filters. This will make them be applied before your Top N calculation is calculated - this wasn't happening before so the Region and Country filters weren't having an affect on Top N.
Lastly, on your Metro filter, I changed the Top N limit on Overall Condition to use the Max values for CLF score instead of sum since sum is going to use duplicate records.
All of this is in the attached workbook.
Thank you, Paul!
Welcome Marc! Happy to help