My fellow users,
Just a tip or a suggestion for a future version:
When you make an advert, for example, to a car in a Vehicles category and afterwards you decide to add some extra fields for the Vehicles, like brand, Km or Type, all the old adverts in the category will display "Item not found"
Advice: Create all the categories before it goes on production.
Admin: Please do something on the database query to bring all the information even if it is new or empty.
Hope it helps..
Tirso Oliveira