Hi Ernest.
Thanks for your reply. It almost works!
I have the opposite issue now. I have all products showing in stock when some are not in stock.
So to confirm how I use woocommerce i use external affiliate products for in-stock items and when they go out of stock or are no longer available I change them to a simple product and change the stock status to out of stock in the manage stock section.
It would be good for you to get to the bottom of this as I can not be the only one who uses woo-commerce with affiliate external products.
Thanks
Kind regards
Stuart