Not sure if this is the right place to ask, but I redeemed a $5 purchase with a $10 coupon and evidently the coupon can't be applied to a new cart even though there ought to be $5 remaining? Is there any way to get around this, or have I just tossed away a good five quid? :(

Update: Never mind, should've paid more attention to the fine print. Looks like the rest of the balance is eaten away, which I think is very unfair either way. Where else do you see one-time use gift certificates, honestly?