Looks like the Collection Listing is using a 2-column layout. Try selecting the Collection Listing container and change the grid/column setting to 1 column. Also check the inner row/content block, because it may also be split into 2 columns. Both need to be full width if you want each item to appear in a single row.
Before
After
Thank you … In the end the collection listing didn’t work for me. Luckily in the template I found the preset with the cms connected and I was able to achieve it… so finally my website is ready. is . www.sunrisepanama.org
Congratulations 
