On a test page at this link
http://www.bunkbedking.com/protect-a-bed-pillow-protector-std-test
When I add to the cart different fabrics, when I order the second fabric, it replaces the first fabric in the cart - it does not add it to the cart along with the first fabric.
Also, can I set up an add to cart button that allows the customer to enter the quantity of the item they require?