Once the list of sponsors has been uploaded the sponsor levels can be reordered via the Sponsor module in the CMS.
Click into any sponsor (or the ‘Add New Sponsor’ option in Actions).
Once you are on the detail screen for the sponsor entry click the Add/Edit Level button (located within the Level field).
This will open a window that shows the sponsor levels you’ve uploaded with your sponsors. The levels displayed can be dragged and dropped to reorder them in the order you want.