From my point of view, you just disabled the "full category branch in URL" option. Can you tell me where I can find the duplicates in the sampledata? Using the fullinstaller?
I don't mean there is duplicate sample data, I mean there are duplicate category names in URLs. This happens when "Use full category tree for product links" option is disabled. Then every top level category URL looks like this: category-name/category-name and every child category looks like this: category-name/parent-category-name/category-name.
The problem with the suffix is, that you must know that you must not have the same product and category name.
It is true, yes. But it's a similar limitation to current where you can't have SEO suffix in category alias.
And as the guy says himself: "updated 3.14.14 - I didn't realize that the site I had made these adjustments to all of the categories were set as menu items which of course makes a big difference. Anyway the zip file has been updated with the latest router."
Like he said, it was updated to not require category menu items anymore. Also his router was from VM2. the router I uploaded is from VM 220.127.116.11 with his modifications applied.
Also I just found another issue in original unmodified router when "Use full category tree for product links" option is disabled. Itemid is not set properly for product details which causes current Itemid to be added (e.g. /cart/product-name when in cart view if there is a cart menu item) or basic URLs like this: /component/virtuemart/product-name in some cases. To reproduce, add product to cart, go to cart page and check product links in cart.
Also limitstart and limit are added to canonical of product details page on a few sites for some reason. These could be explicitly unset in productdetails since they're not used at all?
I have uploaded my latest router. Please test anyone.