Currently when creating a new option you’re only presented with the option to add Pros until you save the option.
Once saved you can choose to add additional pros or cons. However, if you add another Pro you again are only presented with the option to add more Pros until saved, and if adding a Con you’re only presented with the option to add more Cons until saved.
Perhaps one button saying Add Option, with a setting on the option to say whether it’s a Pro or a Con (or both).