Sent you a message on this, but yes, my Amoeba copy has two UPC stickers on it. The one underneath has a black magic marker line through the barcode, like many promo copies do. My guess is that these were originally intended as free promo copies, but when the decision was made to pursue Grammy eligibility, they printed up new UPC stickers so that the LP would be "scannable" at a retail store.
And yes, from what I can see on ebay, the Looney Tunes copies only have one sticker without any magic marker on it, thus not requiring a second sticker. Strange!