not sure if I got your question correctly. However, if you can't filter the items in catalogue according to a product type or category, click on one of the items in your catalogue. You will see a title, description, price and product type of the item - if it's missing or if there're random numbers, you will have to change the product type. Then, you will have to change in for all of your items in the catalogue.
After clicking on of the items in your catalogue, you can also check other fields in the catalogue by clicking the button View more fields.
I might have understood the problem incorrectly, so let me know if yes and I'll be happy to discuss the issue further with you.