You can use the sub-layout element and parent dynamic content functionality to create a list of adverts instead of using the Classifieds grid element.
First, add the sub-layout element in a position where the adverts list should be displayed.
In a sub-layout add a new section and set the "Ads" as a dynamic content source for the whole section.
With the standard YOOtheme PRO features build the layout of a single advert item in a way you like it to be displayed in the category view.
Finally, add the "Parrent" dynamic content source for each element and set the dynamic content type in the fields you need.