I'm going to take a guess and then probably open up a ticket for this. The NOW API was built before we had MMA support in our core API offerings. After working with our MMA data, we standardized on the format in our core sports API.
I'll add a ticket for this issue so we can get it resolved. I'll try to reply here when that has been completed. Also, we're looking into other methods of messaging out our routine changes to the API.
Regards, Roger