I've read the known glitches, as the rules of the reports...I think this should be the right place to report it. Anyway, letting the staff know: I just opened my Subeta and saw 2 notifications about winning the last Trivia game, then I went in the inventory and saw I've 2 Creepy Creature Masks. I sent my answer once, I'm 100% sure about it!

EDIT: oh wait, I just read the news and saw there was written about the double prize. Really sorry for the post!!