Sounds like a Vegas issue. I'm often jealous of the parlays that don't live in NV who get to play. I'm not sure what rules the Hardrock gets to play by, but at books in NV you can't parlay single-player bets across multiple games and you can't even take a team and the over as same game parlays are also forbidden. When I lived in FL I used BetUS to bet on sports; so it's safe to say it's been a while.