Cannot use all the coupons when testing the form?

I recently tried to build an Order From using multiple coupon codes. However, the form only allowed one of the codes when testing preview.

This seems to render this function useless. Is there something we're missing?

Hi,

You can actually use all the coupon codes you created on the payment tool. Testing it on preview mode works similarly when you test the form live.

Here's my test:

Maybe you have placed Coupon Limit? Can you please review? If not, can you please provide the steps on how to reproduce the problem?

Thanks!