Do you have any thoughts on why this is happening? I used my 30% coupon pretty easily, but after activating a 20% coupon, I could not redeem it; no check boxes to apply the discount on any items. I read that if I log out, I will lose the coupon, so is there a workaround?
The coupon only goes POOF if you use it on your character select screen. If you used it while logged onto a character, it should persist thru logouts. The store in general is just slow (delays before the checkbox can show up) like everything else in the new store has been since they changed it.
I still see both coupon types on my account even after logging out.
But you can go to your account info (in the store) > active coupons page and try clicking stuff: (Any coupon you've entered but haven't actually used on an item should be listed there)
Different people have said things work or don't work over the past few times they've done these codes; a lot of it I think is just the store being slow/buggy to display the checkboxes.