Hi Jostyn,
The amount of styles you can create with a Pro account is endless.
You get the ‘must be given’ remark if you haven’t picked 2 colors and/or haven’t given up a name.
When you publish a plan you can pick a style in the menu with all the publish options.
btw: I checked the style you made. You might want to add a logo in a more legible size. Also, the background image you took can better be a plain colour image or a small image that forms a subtle background pattern.