product navigation macro multiplies by assigned categories

[ned14]

http://code.google.com/p/easyshop-for-plone/issues/detail?id=26

Reported by pedrotschki, Oct 08, 2009 What steps will reproduce the problem?

1. create categories
2. create product
3. assign product to categories

What is the expected output? What do you see instead?

the batch navigation in the header is multiplied by each assigned category. there should be a different product navigation policy.