In an e-commerce site I have products that can be under more than 1 category, this causes multiple urls for the same product, the reason being is that if a user clicks on category A then on product A the breadcrumb trail shows a link back to category A.
The only issue is, in order to ensure that the breadcrumb truly reflects the path the user has chosen I have included the category id in the link to the product, i.e:
...and because products can have more than one category there might be:
However, the usual url for a product would be:
This obviously means I'm having more than 1 url for each product potentially.
Is there a better way to ensure the correct breadcrumb trail?
Or is this really not that much of an issue?!