Hello Sarah,
You can only put one post on each slots of slider right section slot. There is no any more options to make it rotate. If you need slider or something new feature, you have to do some custom work for it. If you need any help regarding to customization, you can hire the customization team for it. http://www.acmethemes.com/customization-request/
If you have any query, please write us. We will do our best to solve your problems.
Regards,
Acme Supports