For the CSS, could you post the link here? I can take a quick look at it.
For the options—this is disconcerting, and something I definitely would like to figure out. Just so I better understand what's going on, could you please do the following?
1. open two tabs, one with admin and one with a page where YARPP is displayed.
2. In tab A, open YARPP settings. Set to List display and save. When the page refreshes, saying "settings updated", does it show that List is turned on?
3. Go to tab B and reload. Does it show the List display?
4. In tab A, set to Thumbnails display and save. When the page refreshes, saying "settings updated", does it show that Thumbnails is turned on?
5. Go to tab B and reload. Does it show the Thumbnails display?
6. In tab A, go to another part of the admin, and then go to YARPP settings (not with the browser back button). Does it still show that Thumbnails are on? (Do not change settings now.)
7. Go to tab B and reload. Does it still show the Thumbnails display?
Sorry, that's a lot of steps, but this would help me see exactly what's happening. Thank you!