Hi,
The export is indeed working like that, it allow to have the correct format to import back the products in HikaShop.
To import, you need the product_id and the category name, so that's why we export it this way.
I understand that you want to have the checked columns data in the csv file, so you can edit the file "administrator/components/com_hikashop/classes/massaction.php" and in the function "_exportCSV()" comment the line:
$this->organizeExportColumn($params->table,$keyTable,$params->elements,$params->action,$params->types);
This will let the category_id and category_parent_id columns, to remove the "product_id" you can edit the file "plugins/hikashop/massaction_product/massaction_product.php" and in the function "onProcessProductMassActionexportCsv()" remove the line:
$action['product']['product_id'] = 'product_id';