for those of you who used the stacked coupons - call your credit card company and check the order on the OD site. They have charged "adjustments" to remove all coupons except one $20 one.
UPDATE -
Called 800-944-3340 option 5 and they gave me a refund of the extra charge.
UPDATE -
Called 800-944-3340 option 5 and they gave me a refund of the extra charge.