With the current sale that expires in 3 1/2 hrs....there is a 10% and 20% coupon...If an item qualifies for the 10 only but is under the $100 for free shipping, and I also order a bunch more stuff with the 20% coupon...do I need to place 2 separate orders since you can only use 1 coupon code per order? Then will they charge for shipping on the item that didn't reach the $100 and provide free shipping on the other? I guess I could order another item on the 10% off in order to surpass the $100 for free shipping. Can anyone clear this up for me?