You got ripped off. NANYA RJB is not 8x-certified media. It's cheap, low-quality, generic, no-name media and most likely, it will burn terribly in your 812S at 4x, so don't even think about 8x (if you really do want 8x, you can force your LiteOn to do so...)
If I were you, I'd return these discs because they're not 8x discs. And because you have a LiteOn, please use good media. The one weakness of LiteOn DVD burners is that they can't handle the really low-quality stuff. After you figure in the number of coasters you'll get and the fact that cheap media will degrade earlier so you'll need replacements, cheap media is actually more expensive than decent media--you just gotta figure in the other costs.
Good luck with your next media batch!