Hi I have set up a multiple item discount ,$1 per extra. It's not working ?

[sparklejunky30]

Hi
I'm trying to put up a discount for multiple item orders . For a $1 more per item. However it's not working ? I've had to refund the overage ! What am I doing wrong ???

[bestchoicebrand]

Offering shipping discounts

http://pages.ebay.ca/help/pay/shipping-discounts.html