Hi CarlaC,
First, you should keep in mind that SB 10.x has website content topics, not design templates/presets. These topics contain only website pages with content, not design, because their design is generated semi-randomly upon website creation (they have several header images associated with them, though).
Second, if you want to customize website content topics, we are working on this functionality, but there are some limitations. Drop me a PM if you're interested.
Third, if you want to provide different design templates upon website topic selection, this functionality is not available (because there are no design templates) and it's not in our immediate release plans.