2 of 3 added 6 characters in body

Single Product URL Path

I'm struggling with the single product URL path.

If I go to horloges-mannen.nl/herenhorloges/casio.html (just an example), I can choose between the recomended and just watches brand itself. When I click on one from the recomended list, it gives this URL: horloges-mannen.nl/a158w But when I click by the other watches, it gives this URL: horloges-mannen.nl/herenhorloges/casio/a158w How can I get them all the same way, like the /category/subcategory/product URL(2nd from those 2 links)?