Offer and Promo Code

We have recently assigned an offer to several different performances, that will be triggered with a special promo code. Two of these performances have 1 price zone and no restrictions on seats. These have been set up and are working perfectly on our website. The third is only offering this price type in a certain price zone and was disabled in all others. When the offer was set up we unchecked the "override default price type" in the offers for Web MOS.

However, when the promo code is entered, customers can only access screens with the specific price zone and it will not display the default price type for seats outside of this zone, and only displaying our youth and student price types. Is there a reason why it is still overriding the default price type even though we unchecked those boxes?

Thanks for any assistance.