Ha, learned something today. So you need to simply name the group name in the settings for all the buttons the same. Apparently the html only lets you select 1 button with the same group name. I’m not sure how that will end up on the other end of the form though. Try that while keeping the value as it is and see if the form still looks as it should when you get your email.
Once you get that working you can get rid of the select one text and just write type or something like that instead