Problem with a simple TOP5

[Anonymous]

I everyone, 

I am trying to make a simple top 5 on a table. 

So I created a filter "First N" filtering the first 5 rows by Amount Desc.

The table is something like this: 
DATE | STORE | N° Gift card | Amount 

But the filter won't work, I keep getting too much lines, (I clicked on "apply filter"), I tried to do this on visuals in case it was the "table visual" that wasn't compatible with the TOP N filter but it doesn't work either. 

Do you have any ideas why a filter that simple wouldn't work ? 

Thanks a lot guys ! Do not hesitate to contact me if you need more info.

[lbendlin]

Do you have a lot of gift cards with the same amount?  You can add a small random value to the amount in order to break the ties.