I can't replicate this behavior with sample data - it works fine with Superstore Sales - could you post a packaged workbook so we can take a look?
I'm guessing you're finding the top 6 using a table calculation. You'll have to edit the way the table calculation is being computed. Choose the Advanced option and place whatever is on the columns shelf into the Compute Using box and then the field that is on the color shelf. Then, choose the columns shelf field for At the level and restarting every: none.
This should give the desired outcome. If not, then post the workbook if possible!
Hope this helps!