I am new to Shopify.
I used Etsify to transfer my products from Etsy to Shopify.
Recently, I noticed that any products that sold, were not being removed from my shop. Then I realized that in the shopping cart, there is a quantity box and customers can add 100 items 
Our products are one of a kind and once they sell, the inventory for that product is finished.
How do I change the inventory to 1 ? I tried using the bulk editor (products - bulk editor - inventory quantity) but it is not working. I changed a product to “1” but when I go to my shop and check, I can still add multiples of that product in the the shopping cart.
Please help : )
Thank you !