You're getting the SOLD OUT image because of your STOCK settings. You have not put a QUANTITY in each product for stock, but you have your stock settings to show "Sold Out" when 0 items in stock.

Either:-

Switch of your stock management (ADMIN>>>CONFIGURATION>>>STOCK) - Variuos setting options here.

Or:-

Enter a VALUE for each product, in terms of the quantity of stock you have for each item.