Coupon Restriction by Zone not working when I require Terms and Conditions checkbox

I created a zone that includes every country in the world except Japan. (Believe me, I didn't want to do it this way, but it seems the only way to presently exclude a single country from using a coupon.) Anyway...

I then have a coupon that I want to be valid for all of those countries (thereby excluding Japan). So in the Coupon Admin, that coupon has my "exclude Japan" zone selected.

I have created a test customer with an address in Japan.

During checkout, on the checkout_payment page, if I enter the coupon code and purposely do not tick the "terms and conditions" checkbox (so that it keeps me on that page), it will tell me that "The coupon code you entered is not valid for the address you have selected." Which is correct.

However, if I enter all the information again and tick the "terms and conditions" checkbox so that I proceed to the next page (checkout_confirmation), it accepts the discount coupon! (and says "Congratulations, you have redeemed the Discount Coupon.")

I'm having a similar issue...I have a couple of coupons that need to be restricted to a certain zone, in this casey Maryland - I've got the coupon set up with the restriction, but someone just used the coupon and they live in Pennsylvania! Any advice???

This seems like some kind of a bug and it would be great for someone to look into it.

<Bump> I was wondering if someone from Zen-cart could look into this. I'm about to go public with a store, I need to have a coupon that excludes Japan, and as described above (and apparently at least one other person has the same issue) - it doesn't work right. The coupon can be used depending on the order of execution of the checkout process. Thanks.