We are using the Category Quantity Discount and it does not calculate correctly unless the user clicks the "Update Quantity" button on the shopping cart page. This is not a good user experience for our customers. Is there a know fix for this?

There is only one category and only one discount applied  to the products but the discount is complicated. Basically the product costs $3.00 but every two are $5.00.

1 = $3.00

2 = $5.00

3=$8.00

4=$10.00 and so forth.

Correct it doesn't always calculate the discount when adding products to the cart. If you change the quantity in the cart and click "Update Quantity" it calculates correctly. But if you delete an item from the cart the discount does not calculate correctly.

Understood.

What I am having issues with is if I add a couple of items to the shopping cart. View the cart then continue shopping and add more items to the cart. Then return to the cart the discount is not calculated correctly until the user clicks on the Update Quantity button or you checkout.