this demonstrates that you entered the metainfo logging into the backend using the wrong domain http://www.koffiematters.nl/administrator
instead of : http://koffiematters.nl/administrator
So you know this for the next time, and pay attention to not do wrong again.
For this time, my advice is to login again as http://www.koffiematters.nl/administrator
, export the CSV, change all links to http://koffiematters.nl
, import them back logging in with the correct domain http://koffiematters.nl/administrator
About the SEF links, i should analyze better how you are using Hikashop. If your product links are using the Canonical Hikashop option (as recommended) i suggest to use the plugin data source for JSitemap. (attached here too)
If not, you have to choose the 'Manual menu item alias for SEF links' in the data source settings for Hikashop products corresponding to your menu item 'Product overzicht' -> http://koffiematters.nl/koffiemachine-kopen/product-overzicht